Join Now
International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for January 26, 2006
International Automotive Technicians' Network (iATN) - Members Only
(Also Available: All, Asian, Chrysler, European, Ford, GM.)
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Open Help Requests for GM
Help Request Answers
1991 Buick Park Avenue 3.8L No Start, Stall VIN: 1G4CW53L7M
need help customer towed car in say car died won't resart untill @ 2hr after running or after set during work didn't found problem at first reconmend fuel pump [wave form looked bad almost straight line towed back in 3 days later let run @4hr. shut car off @2h...
1998 Cadillac Seville STS 4.6L Interior lamps VIN: 1G6KY5496W
Hello We have the 98 STS with interior light problems. All four door lights and overhead reaing lights do not go off. We used Tech 2 and tested all door switches, all are functioning. Tested and clean G301 and other ground connection. Tested 3 main control rel...
2003 Cadillac DeVille 4.6L MIL Lamp on, Check Gas Cap Messag VIN: 1G6KD54Y43
This is the third time the car is present in our shop with this code and the "check gas cap" message. We smoked the evap system twice and never found a leak. Trouble codes: P0440 (Emission System Fault Large Leak)
2004 Cadillac DeVille 4.6L dash light on VIN: 1G6KD54Y74
customer drives car and abs light comes on while driving there is never any codes stored and all data is correct when you look at the scanned data it reads the light should be off , but yet the light is on , we replaced the instrument cluster thinking an inter...
1993 Chevrolet Lumina Euro 3.1L Excessive Emissions VIN: 2G1WN54T9P
Hi all! This wonderful piece came to our shop having not run for several years. First thing we replaced the ignition module for no spark. It kicked off and we were on our way. We replaced the coil for a cracked tower, the egr for cracked solenoid, and R&R'd th... Trouble codes: 43 (ESC module circuit - intermittant)
1995 Chevrolet K1500 Cheyenne 5.7L Excessive Emissions, Hesitation VIN: 1GCEK19K3S
Hi guys, need your help again. The vehicle will fall on its face under hard accelleration. Kind of acts like a bad accellerator pump on carbureted vehicle. If you feather the throttle to 2000 RPM it will then takeoff and run decent. Seems to idle ok just dead ...
1996 Chevrolet K2500 Suburban LS 7.4L 4wd VIN: 1GNGK26J7T
Customer states that 4WD hi light blinks when turning corners at highway speed. 4WD operation doesn't seem to be affected. This is a 4WD push buton system.It does not have the 4WD auto button. We got it acting up just like the customer stated. Also we got it a...
1999 Chevrolet Step Van 5.7L No Start, No Crank VIN: 1GBHP32R2X
This truck came in on the hook with a no crank condition. Installed new battery and still no crank. I checked the Solenoid Assembly Interlock and found a broken cable. Will a broken cable on the solenoid Assembly Interlock cause a no crank? I noticed the volt ...
2000 Chevrolet Express 3500 5.7L front pads VIN: 1GBHG31R4Y
this is a very overloaded work van, we do a whole fleet and this is the problem child. today they waited for a quick pad pop. I am going to change the calipers and front brake hoses, and make sure the rear wheels hold when they can leave it for a day or two.we...
2000 Chevrolet Corvette 5.7L MIL Lamp on VIN: 1G1YY32G5Y
hello boys and girls, this veh came in with a MIL and code 0410 only. cleared code and returned to cust after brief visual inspection. came back 2 days later with same code returned after 31 starts. engine runs perfect. no drop in mpg. no vacuum leaks found. o... Trouble codes: 0410 (air injection system)
2001 Chevrolet Venture LS 3.4L gauge VIN: 1GNDX13E61
Fuel gauge is erratic and appears to be the sender and I believe this to be a common complaint so my main question is that there may be a hidden warranty on this and or a TSB if so I would appreciate any info on this and if there is a warranty as to how to pro...
2003 Chevrolet Silverado 2500 HD 6.6L Tow/Haul Mode VIN: 123F122986
See info below
1997 GMC Yukon SLE 5.7L Stall, MIL Lamp on VIN: 1GKEK13R9V
After running through some sensor wiring verification tests, I've discovered that the CSFI unit has sprung a leak and pushed fuel into the PCM through connectors C1 and C2. I've heard of this but never had one yet. The question is, other than fixing the fuel l... Trouble codes: P0117, P0502 (vss low), P1114 (ect low intermittently), P0712 (trans fluid temp low), C0035 (Rear speed sensor open or shorted)
2000 GMC Yukon XL 1500 SLE 5.3L key fobs VIN: 3GKFK16T6Y
Thanks in advance,truck came in this AM,had a washer fluid leak and fobs didn't work with engine running.They had already replaced washer resevoir,i diagnosed leaking pump and moved on.I verified fobs worked with key in ign and on,started the truck and tried t...
2001 GMC Sierra 1500 SL 5.3L MIL Lamp on VIN: 2GTEC19T31
hello-need help from a gm tech that is familiar with this code-checked all hoses and connections-nothing is disconnected- or broken-not a familiar fault for us-by looking at plumbing of system cant see how computer can tell the difference between banks.?-any h... Trouble codes: P1416 (secondary air injection fault bank 2)
1994 Oldsmobile 88 Royale LS 3.8L low power VIN: 1G3HY52LXR
this car came in last week for poor running. car had bosch spark plugs so i sold him a set of ac plugs and a motorvac. customer came back this week and said the car runs bad cold.we cold started it and took it for a drive and sure enough it runs like shit. whi...
1996 Pontiac Sunfire SE 2.2L Poor Idle Quality VIN: 3G2JB5246T
car was running rough and using alot of gas, replaced egr valve and 02 sensor about 2 weeks ago, ran fine for 2 weeks now starting running poor intermetantly, running lean, only thing out of specs is map sensor, check ok. any suggestions? Trouble codes: 108 (map baro press signal high), 172 (fuel system too rick 1), 1406 (egr pintl position ckt problem)
1996 Pontiac Bonneville SE 3.8L Battery VIN: IG2H5216TH
This vehicle has an intermittant key off battery drain.It happens so seldom that I can't perform much diag. before it will go away and who knows when it will return. I have seen that the climate control center on the dash, the heads-up display and the blower m...
2002 Pontiac Grand Prix SE 3.1L Hesitation, Misfire, MIL Lamp on VIN: 1G2WK52J02
This vehicle misses on all 6 cyliners randomly, primarily on #2 under load. Mostly does it when its hot. A complete Tuneup was done, coil packs changed, Ignition Control Module, and a Crank sensor(24x). We are very much baffled with this vehicle. Any help woul... Trouble codes: P0300
1994 Saturn SL1 1.9L Oil pressure VIN: 1G8ZH5596R
Hello, I have a 94 SL1 that is a used car on our lot. It came into service no start, locked up engine. Main bearing had spun. Our machinist advised against line boring because the block was pretty torn up, so we installed a used engine instead. During compo...

Fixes & Summaries for GM
Fix/Summary Answers
1992 Buick Regal Gran Sport 3.8L Stall VIN: 2G4WF54L2N
Special thanks to Chas from AZ. After previously checking the pressure regulator and not finding anything, I decided to check it again with a long clear hose on it. And to my suprise the regulator was leaking. Replaced with new delco regulator and all is good....
2002 Buick Century Custom 3.1L abs VIN: 2G4WS52J62
This problem was quite intermitent and the customer decided to wait until a complete failure occurred. The information I got from fellow tech included pattern failures of the bearing and wiring harness...water intrusion and metal flakes in the wrong places. Th...
1994 Chevrolet S10 2.2L Flexplate VIN: 1GTCS144XR
All information pointed to the dowels at the back of the block or a crankshaft bushing missing. After talking to the tech who installed the engine, he stated he can't remember if either were installed. The owner of the truck can't make up his mind if he want's...
1997 Chevrolet K1500 Cheyenne 5.7L Excessive Emissions, Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 2GCEK19R2V
we have a fix!!! the problem was that the fuel tank was indeed bent up but was under a plastic shield(not easily seen)-after pulling sending unit you could see that the end of return tube was nice and shiney-cut a 1/4 inch off of tube and presto-the only expla... Trouble codes: P300B (random missfire-).
1997 Chevrolet Blazer 4.3L engine VIN: 1GNDT13WZV
thanks for all your advise. fix was a set of pistons thanks again tom [...]
1998 Chevrolet S10 2.2L Hesitation, Surge, MIL Lamp on VIN: 1GCCS1449W
hello agin all. the truck is fixed the fix was to replace both the cam and the crank sensors. Tony from Min. hit it on the head thanks. Lewis from CA hope you never have a ford concern.. Thanks everyone for your time Trouble codes: P1626 (anti theft), P0440 (evap), P0341 (cmp sensor circuit), P0404 (egr circuit), P0335 (ckp a circuit).
2002 Chevrolet Avalanche 2500 8.1L trans temp hi VIN: 3GNGK23G32
thanks for all the replies, i took the truck back to the trans shop, cause i did not have any time, got busy you know how that goes, so as soon is i find out i will let you know thanks agian to everyone.
2002 Chevrolet Impala LS 3.8L No Start, hard start VIN: 2G1WH55K92
I cleaned the maf sensor , it still every once in awhile will have an extended crank time.(still 1 in 7 trys are extended) thanks to all who replied, we will wait to see if the no start gets more frequent! thanks Bob
2003 Chevrolet Malibu 3.1L MIL Lamp on, guages go out VIN: 1G1ND52J23
well group we got a wiring diagram for this and we checked grounds and the only thing we found in common was the ign switch so we repleaced the ign swith and the car has been gone and has not had any more troubles so i will call this a fix thanks for every one... Trouble codes: P0443, P0449, B2600 (daytime running error), B2602 (DRLrelay output shorted to ground or open), B1379 (ign 3 imput), P1585 (CC inhibit ckt CC lamp control ckt).
2000 GMC Yukon XL 2500 SLT 6.0L hard start VIN: 3GKGK26U2Y
Thanks to all that replied, plugged evap canister& vent, thanks again every one!
1985 Oldsmobile 1985 3.8L oil pump
I guess you guys know what assume means. We received this car as a basket case. Some weekend warrior had started a timing chain replacement and got in too deep. We assumed that what parts he had reinstalled were correct. WRONG! We removed the oil pan to inspec...
1989 Oldsmobile Delta 88 Royale 3.8L MIL Lamp on VIN: 1G3HY54COK
thanks friends for all the help we were not able to repair the vehicle the customer would not approve any more diagnostic time we do suspect that it is the circurity in the aftermarket ignition moudle as was suggested by serveral that responded because the sta... Trouble codes: 42 (esc circuit low).
2001 Oldsmobile Aurora 4.0L Misfire, MIL Lamp on VIN: 1G3GS64C91
Thanks to all who took time and responded to my situation. We continued to check all items that could possibly effect this misfire, fuel pressure, fuel pressure regulator, etc. Since this system has a coil on plug arrangement AND the coils are all together wit... Trouble codes: P0300.
1996 Saturn SL2 1.9L Excessive Emissions, Surge VIN: 1G8ZK5272T
thank you guys most of you were right it was the coolant sensor and the connector that were contaminated with coolant
Prev (Also Available: All, Asian, Chrysler, European, Ford, GM.) Next