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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for March 29, 2013
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Open Help Requests for GM
Help Request Answers
1995 Buick Riviera 3.8L Poor Idle Quality, Misfire VIN: 1G4GD22K3S
Vehicle came into the shop running very rough at idle. We hooked up scan tool and found the the stft 182 counts and ltft 149 counts with an o2 sensor reading of 13 MV. Idle smooths when propane is added to air stream and fuel trims come down with o2 reading in... Trouble codes: P0740, P0171, P0131
2007 Cadillac DTS L 4.6L Air Ride Level VIN: 1GEEH06Y67
This Caddi is a funeral coach - the air ride suspension is only on the rear & we do not have a wiring diagram that shows the air pressure sensor circuit in it. this car will cycle the air out of the rear when car is shut off. it will not raise the car when sta...
1981 Chevrolet G30 Hi-Cube 5.7L Unknown VIN: 2GBJG31M8B
This van has strange ac issues. It has been converted to R134. It blows cold and works well but can't get the charge right. No matter what charge you put on it it will freeze up or enough charge to not freeze up is to high of pressure on the high side. The sys...
1997 Chevrolet K2500 Suburban LS 7.4L Poor Idle Quality, Hesitation, Cuts out, Misfire, MIL Lamp on VIN: 3GNGK26J3V
this vehicle came in with a bad engine, spun rod. we rebuilt the engine, on first start up found out the vehicle had been setting for approx. 2 years.replacedc fuel pump, filter, and sock, drained tank and put fresh gas in, during first test drive , vehicle ra... Trouble codes: P0154, P0327
2003 Chevrolet Silverado 1500 5.3L Transfer Case VIN: 2GCEK19TX3
This vehicle came in for no 4WD. Diagnosed that the front axle actuator was not working, replaced actuator. After further diagosing we found the clutches inside of the transfer case were worn. We replaced the transfer case with a rebuilt. Now the pickup will s...
2003 Chevrolet Trailblazer LT 4.2L MIL Lamp on
I'm hoping to solve this issue soon due to smog test coming up So the truck functions fine, it doesn't give me horrible gas mileage neither does it hesitate nor take more than a second t start up, everything functions fine beside the CEL light for p0440 (evap ... Trouble codes: P0440
1993 GMC K2500 Sierra SLX 5.7L Headlights VIN: 1GTGK29K3P
Hey guys, Simple question. This vehicle has the halogen, replaceable bulb (not sealed unit) headlamps. Two per side, rectangular in shape. When on high beams, do all 4 lights come on or only two (which is what it is doing right now). Thanks! Ken.
2000 Pontiac Grand Am SE 2.4L cooling system VIN: 1G2NF52T6Y
Hey Hey Ya'll, I gotta think I'm missing something but can't seem to trip over it. This car will overheat at idle consistently. Fans come on low at 219 and will kick to high at 232. Will continue to climb until you shut it off. If you do not shut it down and ...
2004 Pontiac Grand Prix GT2 3.8L Electronic Power Steering VIN: 2G2WS54274
Here is a good one for you GM guys. The vehicle came in the other day complaining of variable assist light on and very tight steering. Power steering pump and rack were both leaking fluid so we recommended replacement which the customer ok'd. After replacing ...
1999 Saturn SW2 1.9L driveability VIN: 1G8ZJ8277X
This saturn showed up no start,found no fuel pressure,replaced pump and filter,starts and runs ok until you turn on headlights then fuel pressure drops to zero and will not run with lights on.Any help would be apperciated

Fixes & Summaries for GM
Fix/Summary Answers
2007 Chevrolet Avalanche LTZ 5.3L Misfire VIN: 3GNFK12347
"Closed", see update info. Couldn't duplicate. Might have been sludge in a lifter passage, now clear, working great. Trouble codes: P0300 (multiple cylinder misfire), P0305 (Cylinder 5 misfire), P0171 (lean bank 1), P0175 (rich bank 2).
2007 Chevrolet Impala LS 3.5L No Start, died while driving VIN: 2G1WB58N17
hello everyone. thank you all for the help. the fix was a pcm. voltage dropped wiring on this oil leaking beast and all was ok. there was an excessive amount of doctored up front engine harness wiring. got vehicle running and explained and showed customer the ...
2008 Chevrolet Silverado 1500 WT 5.3L transfer case shift control module VIN: 2GCEK19J78
ok so i sent the truck to the dealer and they replace the tccm and reprogrammed it all good! thay said i must of had a defective one! or i f--- up! any way tk-u all of u for all the help
2000 Pontiac Grand Am SE 2.4L Parking Lights VIN: 1G2NF52TXY
Thank for all of the repl1es and help. Plulled connector C-3 on RH IP junction block and found dead short on B1 brown wire circuit 9 marked IP lamp feed from identifix.com. Clipped wire and put all light bulbs and fuses in. Turned on park lights and still had...
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