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Prev Professional Automotive Repair Technical Discussions for October 17, 2007
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Open Help Requests for GM
Help Request Answers
2002 Buick Century Custom 3.1L abs VIN: 2G4WS52J82
This vehicle has a code C1218 Pump motor open or shorted. We replaced the Lt front wheel wiring harness. (it was cut) We can't find a bad wire or a bad ground. I was wondering if there is actually an issue with this pump or we are overlooking something. I have...
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1985 Cadillac DeVille 4.1L Ride Height VIN: 1G6CD6989F
Hello all, this is a continuation of a previous help request that I am still working on and IATN wouldnt let me update the request again. Please see the previous request for the gory details, but the short version is; Rear suspension sits very low. Compresso...
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1985 Cadillac Cimarron 2.0L No Start, Cuts out, Stall VIN: 1G6JG69P6F
This car will start then stall. After several attemts it will start and run fine. Shut it off and it will start then stall, sometimes for a long time before it finally runs. I can see the injector stop spraying before it stalls. I put a ign module in cause it ...
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1993 Cadillac DeVille 4.9L a/c controls VIN: 1G6KS5289P
replaced compressor and have no power to clutch to control system have tried reprograming system and still no power
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1994 Cadillac DeVille 4.9L Engine VIN: 1G6KD52B5R
This car came in no start- tried to start a few times and the starter (which was removed and bench tested) just groans hard and won't turn motor. Motor will not turn clockwise by hand either. It will turn counter clockwise completely through its cycle. It WILL...
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1995 Cadillac DeVille 4.9L pump noise VIN: 1G6KD52B4S
well here is another one guys, i'm pulling out my hair. deville with a power steering noise. it howls and groans, it seems to subside when you turn the wheel, but makes good noise when just sitting idling, if you wiggle the steering wheel it seems to subside a...
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1999 Cadillac DeVille 4.6L clutch VIN: 1G6KD54Y5X
hey guys and gals, i've tested every fuse in the car and they are all good. i cleared the codes w/ the battery cables tied together, w/ a scan tool and w/ the dashboard controls and still no a/c clutch engagement...most of the time. every once in a while the c...
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2004 Cadillac Escalade ESV 6.0L Hesitation VIN: 3GYFK66N94
thanks again, We have an Escalade (dive by wire) Intermittently when you take off it feels like your no even on the gas, but the gas is on the floor. No code. I cleaned the throttle plate & bore and it was ok for two or three weeks. Now it's back same thing. A...
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1998 Chevrolet Cavalier 2.2L vtd system, codes VIN: 1G1JC5249W
Need some other brains to pick this situation over with me!!! This chevy cavalier came in on a no start situation. The problem is it wont start till around 10:30 or 11 o'clock am. Every day its the same like its on some kind of time... so you can see my fustra...
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1999 Chevrolet K1500 LS 5.7L Cuts out VIN: 1GCEK19R4X
Main complaint hard miss and slow recovery time when entering from freeway on ramp at WOT at 70 mph or pulling trailer uphill. Engine will surge momentarily, cut out hard enough to shake the truck. After backing off, normal power comes back after about a half ...
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2001 Chevrolet Silverado 1500 5.3L Misfire, MIL Lamp on VIN: 2GCEK19T01
This pickup came in for a tune up. It was running ok but he wanted to get ready for winter. I changed the plugs and fuel filter. when I was finished it had a miss on number 8 cylinder. I shut it off and checked to make sure I had the wire on tight when I resta... Trouble codes: P0300 (Engine misfire)
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2002 Chevrolet S10 LS 4.3L fuel gauge VIN: 1GCDT13W82
The fuel gauge is not working. I tested the fuel level sensor first, 250 ohms. The gauge should be reading full. Using MODIS I read fuel level in the PCM datastream while I varied the resistance with a gauge tester. The fuel gauge never moved from empty, but ...
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2003 Chevrolet Trailblazer North Face 4.2L Blower Processor, HVAC Control Head VIN: 1GNDT13S73
Customer complains that when the HVAC system is in "AUTO" mode the blower stays on high no matter what temperature is selected. Blower speed can be adjusted via fan speed button, but this puts system into manual mode. Verified customer complaint. Went to blow...
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2003 Chevrolet Silverado 2500 6.0L reverse VIN: 1GCHK29U43
when trans temp getts above 250 degrees and put in reverse the vehical will shut off. there are no codes. i'm not much of a tranmission person but i need to fix this one.
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2003 Chevrolet Trailblazer LT 4.2L knocking in rear end VIN: 1GNES16S13
at slow speeds there is a knocking noise in rear of truck sounds like somthing is loose.we have tightened all body dolts and all suspention bolts.we took out spre tire to see if that was it.the noise stays the same and has not went away.
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2003 Chevrolet Astro 4.3L Hesitation, Surge, Misfire, MIL Lamp on, LACKS POWER VIN: 1GNEL19X23
hi all, looking for some answers, 2003 cheverlet astro awd. codes p0101 and p0300, seem to be related, had some abs codes too ,no results, cleared abs and engine codes, still clear after several drives. concern is lack of power. goes fine on the flat. up to 65... Trouble codes: P0101 (maf performance), P0300 (rendom missfire), C0221 (rf speed sensor open), C0223 (rf erratic sig), C0227 (lf erratic sig)
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2004 Chevrolet Suburban 1500 LS 5.3L Misfire VIN: 3GNFK16Z74
Hi Chevy Techs, I have been helping another shop on this Suburban and there is another vehicle at another shop doing the same thing. Number seven cylinder has a misfire at idle. When you raise the rpm's to around 1500, the misfire goes away. If you go above 1... Trouble codes: P0300 (Random misfire), P0307 (Cyl. 7 misfire)
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2007 Chevrolet Silverado 2500 HD Classic LS 6.6L speedometer VIN: 1GCHK23D57
WE replaced tires with larger size and need to recalbrate the seedometer. we have tis2 porgraming capabilty. Thank You. Carrold
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2004 GMC Yukon SLE 4.8L MIL Lamp on VIN: 1GKEC13V94
Hello All,We have a 04 Yukon with a p0442 .Truck has new dealer gas cap.Did preform pressure test and smoke test with no problems found.Fuel tank pressure reading is good @ 1.5V.Any ideas?Does anyboby know of any reflash issuses?Truck does has 2 freeze frame f... Trouble codes: P0442
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1985 Pontiac Fiero SE 2.5L Poor Idle Quality, Surge, Stall VIN: 1G2PF37R7F
Morning everyone!! This car belongs to a friend of mine and I am looking at it afterhours and I am not getting anywhere. It started off stalling only on decel ie: coming up to a stop sign. It now seems to stall whenever it wants. I can keep it running by givin... Trouble codes: 44 (lean exhaust)
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1988 Pontiac Sunbird SE 2.0L Hesitation, Poor Fuel Economy VIN: 1G2JD11K2J
Hi: Fuel Pressure fluctuates rapidly about 4 needle swings/second, yet always stays within 9-13 psi range. It never goes below min or above max. When I actuated test connector the initial pressure rises quickly to 11 psi, stays there for 3 seconds, then start...
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2003 Saturn Vue 3.0L security system VIN: 5GZCZ63BX3
Towed in no start, left key on for 10min, bat was dead started with jumper unit. Security and service lights were on. Looked through fixes, none specfically for this vehicle, looked to be passlock sensor, have done a coupple prev. always worked ok, learned thi...
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Fixes & Summaries for GM
Fix/Summary Answers
1985 Cadillac DeVille 4.1L Electronic Level Control VIN: 1G6CD6989F
Hello, we finally obtained a replacement ride height sensor and replaced it, no change in the condition. I am still working on this car and would like additional help if anyone has further ideas. The IATN site will not let me post an update so I am clos...
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1992 Cadillac DeVille 4.9L coolant fans VIN: 1G6CD53B5N
this one is a fix . it ended up having both low speed and high speed relays . thanks to all who replied
21
1999 Cadillac DeVille d'Elegance 4.6L No Start, no pcm data VIN: 1G6KE54Y8X
Checked all grounds and powers. Performed voltage drop tests.Never could communicate with computer. Fuse would not blow again.Replaced computer and reflashed. So far all is well. Thanks group. Trouble codes: P0462, P0603, P1189, P1599.
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1999 Cadillac DeVille 4.6L a/c clutch VIN: 1G6KD54Y5X
HEY GUYS AND GALS...I AM CLOSING THIS POST W/OUT A FIX BUT AM GOING TO REOPEN IT W/ MORE INFO. ALL FUSES ARE GOOD, ALL CIRCUITS COMPLETE. I TRIED ALL METHODS OF CLEARING CODES AND STILL NO A/C CLUTCH ENGAGEMENT...WILL REOPEN POST.
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2002 Cadillac Seville STS 4.6L Intermediate Shaft VIN: 1G6KY54942
The updated I-shaft eliminated the clunk. Removed entire column assembly with shaft still attached and changed it out on the bench. Used medical tape to keep steering wheel from turning (medical tape left no residue on column or wheel). Thanks for the advice.
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1990 Chevrolet K2500 Cheyenne 5.7L Excessive Emissions VIN: 2GCFK29K1L
thanks to everyone who replied, several suggested EGR valve problems so I checked passage ways, valve, vac supply, and solenoid all were working. Coolant temp read 185 on scanner. After checking afew other things Iran some combustion chamber cleaner through it...
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1994 Chevrolet Cavalier Z24 3.1L Condensate leak VIN: 1G1JF34T2R
Sorry to close this post so late, guys. I got a lot of really useful information, but I also found a ton of termite damage in the back of my house, so the wife's car went to the back burner. I'll re-post in the next couple of weeks with a fix. By the way, d...
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1997 Chevrolet Venture LS 3.4L Poor Idle Quality, Misfire VIN: 1GNDX03EXV
The vehicle is finally out of my shop. We found a wire that pulled out of the map sensor plug. We repaired it and the idle stabilized. So I thank you guys for all the help. I really needed the extra ideas and appreciate them. Trouble codes: P0121.
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1998 Chevrolet Venture 3.4L Cooling Systems VIN: 1GNDX03E5W
Thanks to all for the excellent responses. Coolant is clean, no intake leakage. I changed the low coolant sansor, again. Going from a SMP to a NAPA unit. Whether they are manufactured from the same company, I have no idea, but light is off and functioning prop...
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1998 Chevrolet C2500 Cheyenne 5.7L No Comunication VIN: 1GBGC24R3W
Well in the end the fix for this truck was human error on the inspectors part. We don't do state inspections here or this might have been something i would have caught earlyer. After reprogramming PCM, replacing PCM, multiple calls to various sources. This pic...
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2000 Chevrolet Astro 4.3L MIL Lamp on VIN: 1GCDM19W6Y
thank you for your replies we checked the wiring over again rechecked tps with scope no dropouts checked iat and evap vent sol did not find any problems at this time we drove vehicle over 100 miles and could not duplicate complaint so cust. is going to drive a... Trouble codes: P0122, P1122, P0112, P1112, P0446.
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2000 Chevrolet S10 2.2L engine area noise
I do apoligize for the late fix. This truck is finally fixed and out of our hair. The problem, which many suggested, was in fact the serpentine belt tensioner pulley. After removing the belt, we spun every pulley and even started up the truck with not one nois...
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2001 Chevrolet Astro LS 4.3L transfer case VIN: 1GNEL19W11
Just heard back from our customer, he states noise is gone. we filled transfer case with bg synchro shift 2. customer is happy which makes me happy. thanks for all the help.
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2001 Chevrolet Impala 3.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: 2G1WF55K81
Well it's not very often that I get my butt kicked by something so basic. After checking everything suggested by my IATN friends I walked away from these Impala's for a day. When I lifted the fuel rail the next day I noticed quite a bit of carbon looking stuff... Trouble codes: 0300B.
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2003 Chevrolet Suburban 1500 LS 5.3L Transfer case VIN: 3GNFK16T03
Thank you to everyone that relplied. The fix was programming the Transfercase Control Module. We used our Flash 2 Unit from Napa to enter the TCCM and was able to program it. All is working good and another one down the road thanks to iATN. Steve
6
2004 Chevrolet Silverado 3500 6.6L flywheel bolts VIN: 1GCJK39124
Hello, and Thank you to all of you that replied to my post. These replies gave me the information I needed. These flywheel bolts are not special. Now that we have removed the flywheel, and inspected the threads on the bolts and the crank, we found that no lock...
17
2005 Chevrolet Classic 2.2L engine VIN: 1G1ND52F55
Hello,thanks for all the great replies.My vibration is gone!The replies talked about binding exhaust,body/subframe damage,torque converter,and the rest of the mounts.I tried the powertrain mount balance procedure mentioned by David from Pa.and noticed a lot of...
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1998 GMC Safari SLE 4.3L engine VIN: 1GKEL19WXW
THANKS TO ALL WHO REPLIED. END RESULT WAS TIMING GEARS HAS TO BE SET AT 12 O'CLOCK FOR BOTH GEARS TO BE AT TDC COMPRESSION STROKE. ONCE WE UNDERSTOOD NORMAL DIDN'T APPLY WE SET DIST 180' OUT AND VAN STARTED. GRINDING NOISE WAS FROM A BENT STARTER BOLT PUSHING ...
12
2004 GMC Sierra 1500 SLE 4.8L Suspension VIN: 1GTEK14V54
24 out of 26 replies stated steering shaft issues. Customer is persuing this at the dealership level, due to low kilometers on truck. Thanks so much for the bulletin# and positive replies. Customer very pleased with the positive info. Abe
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2001 Oldsmobile Aurora 4.0L struts VIN: 1G3G564C01
Thanks to everyone who helped and especially David [...] who gave me the tsb number 02-03-08-004. This bullenton replaces the upper insulators and is larger to prevent this promblem. Even some GM dealers in winnipeg didn't know this. Thanks Dave you saved me...
3
1991 Pontiac Sunbird LE 3.1L Poor Idle Quality VIN: 1G2JB51T2M
Hey guys and girls.Well the Sunbird seems much happier now after replacing the ecm.After a smack on the side it jumped in RPM,so I asked around and a good buddy of mine had a good used ecm.Put this one in and noticed a difference.A very big thanks to all who t...
20
1991 Saturn SL1 1.9L Poor Idle Quality, Stall VIN: 1G8ZG5490M
Thanks for all your helpful suggestions. The problem turned out to be the wrong PCM! Someone put in a twin cam engine PCM (which has 4 injectors). This was a single cam engine ( one injector). Running it with propane at it's least amount to keep the engine run...
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1993 Saturn SL 1.9L MIL Lamp on VIN: 168ZK5573P
Sorry for the late closing on this, I had a bad toothache that turned into a root canal. Anyway, I bought ATSG book, did all solenoids test and all tested properly. Customer picked up car and said he changed the fluid and filter and that fixed it, I feel the c... Trouble codes: 27 (quad driver mod. fault), 26 (quad driver module failure).
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