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Prev Professional Automotive Repair Technical Discussions for January 27, 2011
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Open Help Requests for GM
Help Request Answers
2004 Buick LeSabre Limited 3.8L Turn signals VIN: 1G4HP54KX4
Customer brought us this car after another shop replaced the left front headlight housing. Her complaint was that the left turn signals do not work at all. I followed what little diagnostic info AllData offers and replaced the turn signal switch since it seem...
2000 Cadillac Escalade 5.7L No Start, Hesitation, Stall, Melts coil VIN: 1GYEK13R6Y
Now two coils replaced and two ignition modules replaced, sets code p0315 intermittently after module fry's. Good voltage and square wave coming from PCM to module. Coil power and ground all good. We are currently out of ideas after testing all known wiring an...
1998 Chevrolet Cavalier 2.2L No Start VIN: 1G1JC1244W
This car originally came in for a no start, replaced ignition module and crank sensor and plugs and wires. Came back 2 months later for intermittent no start. If we leave it outside it will sometimes not start then we bring it into the shop and start testing a... Trouble codes: U016, B1011, B1021, B1028
1998 Chevrolet K2500 Silverado 5.7L Poor Idle Quality, Hesitation, Surge, Misfire VIN: 1GDCJ67R1X
This truck came in with an intermittent rough idle. It felt like it would almost stall at times when coming to a stop / returning to idle. Intermittent misfire on initial acceleration. Otherwise the Eng. runs good at all other times. Scan tested, no dtc's. Fue...
2001 Chevrolet Tahoe LS 5.3L Fire VIN: 1GNEK13T4Y
This truck caught fire and burnt. Upon inspection the transfer case housing is melted away.has anyone seen a case catch fire from being driven with out gear lube.
2001 Chevrolet Suburban 1500 5.3L No Start, Poor Idle Quality, MIL Lamp on VIN: 3GNEC16TX2
hello friends, suburban was towed in, lost power while driving, may start and idle, but stalls, unable to accelerate engine. checked battery charge and cable connections, cleared codes, code resets, unable to accelerate engine with electronic throttle controls... Trouble codes: P1518
2003 Chevrolet Silverado 1500 LS 5.3L MIL Lamp on VIN: 2GCEK19T13
codes p0171 & p0174 always come back after drive cycle is complete. truck never has a missfire, poor performance, or bad idle. looked for tsb on this problem & did not find any. we suspect intake leak or poor injector performance but can not nail it down. hopi... Trouble codes: P0171, P0174
2003 Chevrolet Express 1500 4.3L No Start, Cuts out VIN: 1GCFG15X13
Changed cap and rotor, orignal and you could hear back fire after crank. Got to start. Dies after about 3 seconds. No security light on but it acts like it is enabled. Did the ten minute reset, no effect. Removed fuel filter was black but was able to blow thru...
2004 Chevrolet Cavalier 2.2L Poor Idle Quality, Surge, Cuts out, Stall, Misfire, Poor Fuel Economy VIN: 1G1JC52F04
I have a cavalier that has a rough idle,stalls at stops,and runs very rich.have checked/replaced coil cover,plugs,map sensor with no change(all factory parts).have checked for vac.leaks with none mass air flow sensor,although it acts like a bad Trouble codes: P0300
2004 Chevrolet Silverado 1500 LT 5.3L fuel fill
Has anybody came across a chevy p-u that has trouble taking fuel (very slow) and at the same time always seem to have tank pressure when you remove cap in a day or two later I checked filler neck ping pong ball seems loose no kinks anywhere thanks for know
2005 Chevrolet Suburban 1500 LT 5.3L Power Seat VIN: 1GNFK16Z25
This truck has no movement at drivers power seat i have 12 volts at main connector, i was unable to scan the seat module with snap on scanner, the module has been replaced a few months ago & it fixed the concern , is there a problem with the motors or seat hea...
2008 Chevrolet Silverado 1500 LT 4.8L Dash Cluster VIN: 1GCEC14C08
Hello! Having issues with this silverado dash cluster gauges intermittenly come on and off. When issue occurs, cluster goes dead, but radio and all other modules seem to function fine. Have read and checked all T.S.B.'s related to wiring rubbing near emergency...

Fixes & Summaries for GM
Fix/Summary Answers
2002 Cadillac DeVille DHS 4.6L No Start VIN: 1G6KE57Y42
A big thank you to everyone that took their busy time to help me. The vehicle is now running. We replaced the cam sensor even though there was a signal seen on the scan tool. We believe it got tweeked a little when the students were installing the motor. Thank...
1998 Chevrolet Malibu 3.1L Camshaft VIN: 1G1ND52MOW
Well, thankyou all very much, lots of good info that's apparently pretty common but in the 5 years I have been in Canada I had yet to even hear that these engines had this problem. I'm sure I share the opinion of more than a few people when I say "What were th...
2004 Chevrolet Tahoe Z71 5.3L No Start VIN: 1GNEK13Z44
I would like to thank everyone for there help, the vehicle was consistantly having hard start until this morning. When through all fuel pump tests and found no problems, still not convinced that it may not need one. I unplugged the fcs to take it out of play s...
2006 Chevrolet Silverado 2500 HD LT 6.6L Cooling VIN: 1GCHK23DX6
Thanks to everyone for your help on this. The vehicle finally returned and we checked everything over again. A cold weather cover needs to be installed if the temperature gets under 30 degrees. This is noted in the owners manual. The customer installed the...
2007 Chevrolet Suburban 1500 LTZ 5.3L Noise VIN: 1GNFK16327
I received many good helps, most stating intermidiate steering shaft play. I inspected this and it was good. With the help of a fellow technician, I was able to recreate noise in bay by boucing suspension very hard. I found that the front shocks upper nut had...
1995 GMC K1500 Sierra SLT 5.7L pcm VIN: 2GTEKI9K3S
Thank you for all your help on this. I will wait for some time during the weekends to tackle this project. I was just wondering if it could be done with some ease, and it looks like it can. Thank you all once again!
1996 Pontiac Grand Prix 3.1L MIL Lamp on VIN: 1G2WJ121M5
Shop found blown ECM fuse, which was the common link between these three codes. Special thanks to Kevin, Mark from CA, Matt, Craig, Scott, and Alex. I searched the database first and didn't find a vehicle with the same three codes, and was hoping someone else ... Trouble codes: P0102 (p1652-), P1652 (p1655-), P1655.
2005 Pontiac Vibe 1.8L speed sensor? VIN: 5Y25L63885
The customer was just pushing the button once to clear the system but it has to be pushed 2 times and held the second time, I should have done the reset myself. Gary nailed thanks for the quick response.
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