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Prev Professional Automotive Repair Technical Discussions for April 25, 2008
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Open Help Requests for GM
Help Request Answers
2005 Buick Allure CX 3.8L MIL Lamp on VIN: 2G4WJ56265
This vehicle comes in with check engine light on. Comes on after about a week after reset. Use Scan tool to close solenoid and did a smoke test, no leak found. Replace Fuel Cap, still comes on. Help!!! Trouble codes: P0445
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1994 Cadillac Seville STS 4.6L MIL Lamp on VIN: 1G6KY5290R
This is very low milage one owner car. It belongs to a 89 year old widow & it only gets driven once a week for about 6 miles. The only complaint is servce engine light is on with these 2 codes. Car runs great otherwise. She said it backfired yesterday 1 time. ... Trouble codes: P0025, P0041
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1993 Chevrolet G20 Beauville 5.7L Excessive Emissions, Poor Idle Quality, Hesitation, Cuts out, Misfire VIN: 2GCEG25K7P
This one is driving me crazy!! This very regular customer brought his van in with a stumble upon heavy accel. If you just tap the pedal, it stumbles and almost stalls. After a lot of time put into it i noticed that the injectors just dump a pile of fuel if you...
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1995 Chevrolet C1500 4.3L slip yoke VIN: 1GTEC14Z7S
ON THIS 2WD PICKUP I TRY TO REMOVE DRIVESHAFT to replace u-joints 1 pc shaft, and u know that the slip yoke will not slip out of the output shaft like normal. I had to hammer the hell out of the yoke for it to come out. inch by inch it came out. no rust on spl...
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1998 Chevrolet K3500 Cheyenne 7.4L Steering and Brakes VIN: 1GCHK33J5W
Hello, I have this Chevy 3500 dually with a 7.4 engine. The steering wheel, Hydroboost unit, all lines and the brake pedal vibrate severly at all times. I have disconnected the steering wheel rotational sensor which did not change anything. I have flushed the ...
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1999 Chevrolet Silverado 1500 5.3L seat tracks VIN: 2GCEK19T4X
Howdy, Again, This Silverado is one of many GM trucks that present the complaint of the seats moving back and forth while driving. The cause is the seat track/worm gear is loose and allows about 3/8 inch movement of the seat when accelerating/braking. It looks...
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1999 Chevrolet C1500 LS 5.7L Engine VIN: 1GCEC19R9X
This truck came in with the starter hanging by the wires, and the nose of the starter broken. I turned the engine over to make sure it wasn't locked up. Installed a new starter and bolts, and it immediately bent both bolts. I checked the engine again, and it s...
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1999 Chevrolet K1500 Suburban 5.7L fuel gage VIN: 3GNFK16R8X
fuel tank reads full to long checked voltages from VCM to sender should be 5 volts have 6.7 to sender can manually operate gage with scan tool works ok test wiring expected to have all wires to fuel pump go to open when i disconnected C3 and C1 at the VCM blac...
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2000 Chevrolet K3500 7.4L Poor Idle Quality, extended cranking VIN: 1GCHK33JXY
Truck came in cust complained of long cranking times worse when warm . Checked for codes none found also test drove no problem with running / driveing . Cust also complained that was low on power at times when pulling trailer up hill (with 863 bobcat on 10,000...
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2003 Chevrolet Venture LT 3.4L Poor Idle Quality, IDLES HIGH VIN: 1GNDXO3ED3
thanks in advance i actually have two vehicles doing the same thing one is mine .after avan is warmed up especially on hot days the engine rpm increases as high as 4000 rpm in park or drive. shut van off and restart it will imost times idle normal until you pu...
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2003 Chevrolet Impala 3.4L Misfire VIN: 2G1WF52EX3
This Impala runs very good since the convertor was replaced but the fuel trim numbers at idle are: long term-14 and short term -2 to -6. According to the scan tool it misfires on deceleration for just a second. It does this every time if you rev the engine whi...
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2005 Chevrolet Aveo LS 1.6L Poor Idle Quality, Hesitation VIN: KL1TD52695
This car came in with a check engine light on, had code p0106, MAP sensor, found vaccuum line split to sensor, replaced both line & sensor... Vehicle will want to stall & cut out under accelleration, only when cold, once warmed up, it is fine...We think it's a... Trouble codes: P0106 (map sensor performance)
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1996 GMC Sonoma SLE 4.3L MIL Lamp on VIN: 1GTCS19X2T
this truck came in with the check engine light on, code p0420, catalyst efficiency low, ...the pre and post cat o2 sensors were both ranging from below .100 to .900 rapidly very similar to the 2 front o2 sensors...removed the cat, it looked good, but was a lit... Trouble codes: P0420 (catalyst efficiency)
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2000 GMC K3500 Sierra SLT 6.5L Fuel filter. VIN: 1GTHK33F7Y
Has anybody seen this before. The fuel manager filter is getting a vast amount of what appears to be small metal particals in it. Changed lift pump, filter continues to collect a vast amount of small metal particals. Any and all help would be appreciated.
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2004 GMC Envoy XL SLT 4.2L trailer wire VIN: 1GKET16S94
Hey everyone. Going to install trailer brake controller on this truck. The wiring diagram shows blunt cut wires for the power feed and brake output for the brake controller hookup. I looked under dash but didnt see them. Does anyone know where the are hiding??...
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1997 Pontiac Sunfire SE 2.2L overheats VIN: 1G2JB5246V
Hello everyone! We need help with this vehicle. The vehicle will over heat even after all the above (see related history. We replaced the head gasket, had the cylinder head pressure tested by our local machine shop. Vehicle still over heated. Head gasket leak ...
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1999 Pontiac Firebird 3.8L Misfire VIN: 2G2FS32K4X
hi this is michael from stewarts automotive in sacramento. we have gotten a 1999 pontiac firebird with a misfire issue. scanned for codes got a p0300 random misfire, thats it no cylinder number or any other info. drove the car on the freeway 60mph or so it wou...
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2002 Pontiac Grand Prix SE 3.1L transmission VIN: 1G2WK52JX2
Customer complant is harsh shifts intermitten. and low on fluid after replaceing trans lines and radiator fluid stays up but still has the harsh shifts with code 1811 I can't get it to act up or set code even after using freeze fram.
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2000 Saturn LS2 3.0L Poor Idle Quality VIN: 1G8JW52R0Y
Vehicle had been running decent except the customer was complaining of a buck/surge. Scanned computer, no codes. Oxygen sensors B1S1 and B2S2 both are constantly around 1000mv. Opened main vaccum line to brake booster to try and lower the sensor readings but t...
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Fixes & Summaries for GM
Fix/Summary Answers
1993 Cadillac Fleetwood 5.7L Excessive Emissions VIN: 1G6DW527XP
MANY THANKS.To all who responded.peeled this car like an onion some hack shop welded a universal converter on this car.replaced it. it helped, but not all the way.moved timing back to 0 degrees from [...] advanced when it came in.also ran gm top engine cle...
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2003 Cadillac DeVille 4.6L engine VIN: 1G6KD54Y13
WELL GUYS IT APPEARS THE THE EXTRA EFFORT WE PUT INTO THE FUEL SYSTEM CLEANING DID THE JOB. WE USE A MOTORVAC MACHINE. AGAIN, WE RAN THROUGH HALF THE SYSTEMS CYLCE. STOPPED THE MACHINE AND LET THE CHEMICALS SIT IN THE ENGINE FOR ABOUT 15 MINUTES THEN COMPLETED...
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1996 Chevrolet S10 2.2L Excessive Emissions, MIL Lamp on
Appreciate all the replies, but I was careful to cover all the basics.I just had to step back a minute and think-engine is mechanically sound, all sensors reading properly, but fuel trims trying to subtract fuel,external fuel possibilities eliminated,fuel pres... Trouble codes: P0172.
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1997 Chevrolet Express 1500 5.7L Poor Idle Quality, Stall VIN: 1GBFG15ROV
After checking Fuel presure and watching leak down checked exhaust back pressure all was good removed P.C.M. looked inside it was full of corission replaced P.C.M. van runs good Many thanks. Trouble codes: P0132, P0135 (h02s heater circuit bank 1 sensor i), P0152 (ho2s circuit high voltage bank two sensor one), P0154, P0155.
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1999 Chevrolet K1500 Suburban 5.7L No Start VIN: 3GNFK16R8X
thanks for all the good advise. 55 psi is not enough to make the engine start when cold, I replaced the pump and it solved the problem. pump now has 63 psi.
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2001 Chevrolet Malibu 3.1L Cooling Systems VIN: 1G1ND52J41
Thank you to all who responded to my help request. It may look the samr as the old heater core box but to no avail everyone including alldata were right on. Had to suck it up and do the dash. Was having to do it under warrenty from another long gone tech who d...
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2002 Chevrolet Impala 3.8L no head lights at nite VIN: 1YW835HJE9
GOOD DAY FIRST I WOULD LIKE TO SAY THANKS FOR THE RESPONCES I GOT AND SORY IT TOOK SO LONG TO POST THE FIX IT TURNED OUT TO BE THE MULTIFUNCTION SWITCH IT WAS BURNED INTERNALLY SWITAK WAS REPLACED ALL IS WELL
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2002 Chevrolet Corvette 5.7L Will not run when put in gear VIN: 1G1YY22G27
What a pain in the butt... Thanks for all the replies but none really helped much. The third time it came back we did find we had power at the relay all the time with the key on so I'm sure thats why the relay burn up. It was only made to click back and fou...
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2006 GMC Envoy XL Denali 5.3L starter VIN: 1GKET66M06
After getting a wiring diagram i checked key on powers to fuse #50,44,35, behind drivers seat and # 16,17 under hood, some had power and some did not and those work off the key switch power. i replace the ignition switch , did the relearn process for the pass...
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1997 Pontiac Grand Am SE 2.4L Misfire VIN: 1G2NE52T8V
I want to thank everyone who responded. It was the people who said to only use GM parts that got me thinkng about looking at stuff that had already been looked at. I replaced the Ignition module with ACDelco and all is good. Spark on all 4. Thanks again Trouble codes: P0300 (Misfire).
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2004 Pontiac Montana 3.4L starter operation VIN: 1GMDU03EX4
Thanks to all of you who helped. The general consences was to retry programming again, but with slight differents. I tryed this many times with no success. My client who is a used car dealer doesn't want to spend any more money. I believe the VTD module is the...
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