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Prev Professional Automotive Repair Technical Discussions for January 25, 2012
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Open Help Requests for GM
Help Request Answers
1996 Chevrolet Astro 4.3L Misfire VIN: 1GNDM19W1T
Vehicle has a mifire mostly when cold. It happens under acceleration, goes away at speeds over 30 mph when in top gear. Once engine warms up, a very slight miss occasionally, but is almost completley gone. Symptoms seemed to match those for a bad injector asss... Trouble codes: P0300 (Random misfire detected)
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1997 Chevrolet Astro 4.3L Cuts out, Stall, Misfire VIN: 1GNDM19W0V
this vehicle has been at two other repair shops with no help now i guess its my turn.customer says intake gaskets were replaced in aug. and this problem started 3 to 4 weeks later.complaint was vehicle would stall going up hills,what i have found is it stalls ... Trouble codes: P0108, P1106, P1381
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1998 Chevrolet C1500 Cheyenne 5.0L Poor Idle Quality, Misfire VIN: 2GCEC19M2W
Have a very strange one here, runs rough and misfires only cold, on cylinders 1, 2, and 3 only. Misfire counts on scanner got up to 50 - 60 per cycle. When first started cold does not miss right away. Has to run 30-45 sec. then starts running rough only cyl. 3... Trouble codes: P0300
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2001 Chevrolet Express 3500 5.7L No Start VIN: 1GCHG35R61
When the vehicle first came in it would idle but had a heavy misfire under acceleration. MIL kicked a P0335 code. We had been burned by one before so we started by adding washers to the crank sensor. When that didn't work we watched the scanner and reference w... Trouble codes: P335
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2004 Chevrolet Trailblazer EXT LS 4.2L Instrument panel cluster VIN: 1GNES16S84
Have a trailblazer here for the second or third time with a problem in the ipc. This time it actually was having the problem when the customer dropped it off. The gauges on the ipc will all drop to zero for a while and the brake light,abs light,airbag light an...
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2006 Chevrolet Silverado 2500 HD LT 6.0L Abs Mod. Ses Light VIN: 1GCHK23266
I got a brain teaser for everyone. First off this is a diesel truck w/standard 6spd. Tranny.for some reason it wants to show a gas engine on vehicle build. The engine light and both abs and brake light on dash are on and service brakes flashes on drivers info ...
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2007 Chevrolet W5500HD Tiltmaster W5S042 5.2L brake rotor VIN: 4KBB4B1U6J
replaced pads and rotors on this W3500, after several days driving, the abs light came on, code c0222, is there a special procedure for removing and reinstalling rotors on this vehicle, we were very carefull removing the ring with a puller, reinstalled with a ...
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2008 Chevrolet Malibu Classic LT 3.5L Evap VIN: 1G1ZT58N68
Hi guys i have a p0442 on this malibu i changed evap canister and valve still the light i need help please
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2011 Chevrolet Corvette Grand Sport 6.2L convertible top VIN: 1G1YW3DW4B
2011 car. I think convertible top actuation system is the same of prior years. Car imported from USA. A lot of time stoped (ship, customs, ...) Battery was changed and electric convertible top is not working properly. Never worked since first attempt. Probl...
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2004 GMC Sierra 2500 SLE 6.0L MIL Lamp on VIN: 1GTGK23U24
Hi Everyone, thank you for taking the time to read this. This truck has an intermittent problem with the TAC system. On start-up the check engine light stays on and the message center displays Reduced Engine Speed. We checked all the powers and grounds for the... Trouble codes: U0107 (Loss of communication wit TAC)
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2006 GMC Savana 2500 4.8L dash lights VIN: 1GTGG25V86
We got a fun one here!!!Dash light fuse (TBC3 fuse 16) blows intermittantly. We pulled codes. p0951, p2610, p2625. We checked Identifix. No help there. We check the flow charts for these codes. They are all related. The circuit is #230. We ran dedicated wiring...
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2006 Hummer H2 6.0L Hesitation, Misfire, MIL Lamp on VIN: 5GRGN23U66
Car Came in misfiring found problem to be on left bank as spark plugs where all Black # 1,3,5 and 7. Right bank #2,4,6 and 8 where clean . Fuel pressure is Normal engine compression good . Did visual check and found left bank catalytic converter had a blue rin... Trouble codes: P0300 (Misfire)
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Fixes & Summaries for GM
Fix/Summary Answers
2005 Buick Century Custom 3.1L Guages VIN: 2G4WS52J55
Thanks for the replies. I didn't get to fix this car, they took it to the dealer. I did recieve replies concerning the instrument cluster, checking for codes and transmission problems, however, I can't conferm any of these. Hopefully better results the next...
12
1977 Chevrolet Caprice Classic 5.0L th200 trans VIN: 1N47U7C172
We were not sure if this was their original engine or trans. I'm rebuilding the 200. We will use the good parts. Thanks for the help! Rick
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1993 Chevrolet G30 Hi-Cube 5.7L No Start VIN: 2GBHG31K5P
ok, checked all power and grounds at ecm at first all looked good. After another day of almost pulling our hair out we found that while cranking we would loose power on the one wire. Only while cranking. We traced it out and found corrosion on the back of ...
13
2006 Chevrolet Malibu LT 2.2L No Start VIN: 1G1ZT51F76
car is fixed. the culprit was no cmp signal from the icm. i used lab scope to test cmp/ckp at pcm. then tested cmp at icm. no signal detected. we replaced the icm and spark plugs. the service info i have states it should start without the cmp but have a long ... Trouble codes: P0463 (fuel level sensor ckt).
9
2006 Chevrolet Trailblazer SS 6.0L right front wheel VIN: 1GNET13H86
Sorry for the long delay and thanks to all that replied. I have not been able to get the vehicle back in for any further diagnosing. Did order a new Snap on TPMS tool to help with the process. Thanks again for the replies. If I do get the vehicle back in I wil...
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2002 GMC Sierra 2500 HD SL 8.1L Poor Fuel Economy VIN: 1GTHK23G22
thanks to all that responded. I found that it was the combination of the thermastat and the spark plugs that were causing the fault. the thermastat was keeping the engine to cold and that was causing the e.c.m. to over fuel the engine. Also the plugs were wo...
16
2006 GMC Savana 3500 6.0L MIL Lamp on VIN: 1GDHG31U16
Well the o2 sensors where actually replaced by another shop for this problem before it ever got to us,at that time we replaced the PCM. Removed O2 sensors and the other shop had installed Bosch sensors. We replaced those with AC Delco and all is well. Thanks t... Trouble codes: P0053 (B1s1 heater resistance), P0059 (B2s1 heater resistance).
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2001 Oldsmobile Aurora 4.0L Suspension VIN: 1G3GS64C61
original complaint was thunk from shock, checked shock and found it leaking oil and line was broken,so replacd with ac delco's and new dealer line. Customer came back because it would still thunk BUT ONLY IN THE MORNING noticed on the scan tool that sitting t...
7
2002 Saturn SL2 1.9L noise VIN: 1G8ZK52712
THANKS TO EVERYONE WHO TOOK THE TIME TO RESPOND!! I DO BELIEVE THIS VEHICLE IS FIXED AND THE NOISE IS GONE. THE NOISE SOUNDED JUST LIKE A POWER STEERING PUMP WITH LOW FLUID, SO I ADDED ABOUT 1/2 QUART MORE FLUID TO THE TRANSMISSION EVEN THOUGH THE DIPSTICK REA...
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