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Prev Professional Automotive Repair Technical Discussions for June 1, 2010
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Help Request Answers
1995 Buick LeSabre Limited 3.8L Stall, MIL Lamp on VIN: 1G4HR53L4S
Hello Folks, I have a 1995 Buick Lesabre with an issue. Car belongs to a buddy without employment, so I got into this without really having much choice. Vehicle has sat for several months with a burnt trans. I went ahead and replaced the trans without a test d...
2003 Cadillac DeVille 4.6L High blower Intermittant VIN: 1G6KD54Y03
Head scratcher here. Hope you GM techs can shed some light. Original problem was blower quit, we replaced the blower and module with AC/Delco replacement parts. Comes back the next day and the high blower will cut off for 5-10 seconds and come back on, repeate...
2001 Chevrolet Silverado 2500 HD LS 6.6L No Start VIN: 1GCHK23141
Hello duramax techs, this truck will not start unless you give it a small shot of starting fluid. This seem to crank the engine faster then it will fire. It is cranking fast enough to start on its own. The scanner shows only 6 mps while cranking but when it hi... Trouble codes: P0094 (Fuel system small leak detected)
2001 Chevrolet Silverado 1500 4.8L abs VIN: 1GCEK14VX1
Hi guys, i have a problem that i really need some technical help on. The person who owns this truck tried to do his own brake lines. The problem is he figured out he was lost after he removed all the lines and didn't mark anything. The problem i am having is m...
2003 Chevrolet Express 2500 5.3L Master Cylinder/ABS VIN: 1GCFH25T63
When the vehicle came back, we found a failing brake pressure modulating valve. We repalced the ABS modulator and we felt the brakes were working well when it left but now the customer states it is back to a low, spongy pedal. We do not have the hardware/soft...
2003 Chevrolet Cavalier 2.2L No Start, Stall VIN: 1G1JH14F63
So i have an intermittent long crank or no start problem. the customer also stated that it stalled on him and he had a hard time getting it started again and its always hard to start. so i decide to check the fuel pressure and get 0 psi when it wont start and ...
2003 Chevrolet Silverado 1500 5.3L Poor Idle Quality, Surge, Misfire VIN: 2GCEK19TX3
I know there are a lot of posts for similar issues, but I cannot find one that matches what I've got. This really feels to me like the EGR valve is stuck open at idle, except it's not a California car, and has no EGR valve. I know my problem is linked in some ... Trouble codes: P0300
2006 Chevrolet Tahoe Z71 5.3L Drive-axles VIN: 1GNEK13T66
Need help removing rear axle C-clips. Have removed center pin & clearly see clips, but axle will not push in far enough to release them. This vehicle is leaking at both rear axle seals & need replaced. I have also removed both rear speed sensors. This is the f...
1984 GMC Jimmy 5.0L starter VIN: 1G5CT118B6
I need info on the best way to get this starter out of this 2.8 v-6. The engine menu did not list this engine. I did these years ago. It looks like I need to remove the crossmember that is behind the starter. Or the exhaust manifold. I would rather not deal wi...
1991 GMC C1500 Sierra 4.3L Surge, Cuts out, Stall VIN: 1GTEC14Z1M
Vehicle came in with a start and die when cold. Not cold outside, cold engine. Complaint has been verified easily. The truck will either start and die after about 3-5 seconds or it will start and run but want to die if the engine is warmed up above 140. I don'...
1993 GMC Safari 4.3L Hesitation, Misfire VIN: 1GTDM19Z1P
Vehicle arrived at our shop after another shop investigated misfire without being able to fix. Found arcing plug wire on #1 cylinder and replaced plugs and wires. Now there appears to be an EGR fault that I cannot pinpoint. If the engine RPM is raised off idle...
1994 Oldsmobile 98 Regency 3.8L No Start, Cuts out, Stall VIN: 1G3CX52L0R
This vehicle was brought to us after customer purchasing vehicle and driving it for only a few days. Shortly after a fill up, they began to experience a extremly rough running engine then stalling, hard starts and no starts. Customer and I thought it may be wa... Trouble codes: P0341 (Cam/Crank Error), P0118 (Engine Coolant Temperature Sensor High), P1361 (IC Toggle Signal)
1997 Oldsmobile Silhouette GL 3.4L 1-2 solenoid VIN: 1GHDX03E3V
To all the GM tranny techs. Personal vehicle. Not a tranny guy. symptoms in order of appearance: day 1 - ses light on, p0751, 1-2 shift solenoid performance. ses cleared. trans driving normal. day 2 - transmission loses forward gears, just slips. went to see ...
1997 Pontiac Sunfire SE 2.2L MIL Lamp on VIN: 1G2JB5245V
Hello Techs, We inheritied this Sunfire from another shop that finally gave up. Now WE are ready to give up. It has CYL #2 misfire. It has a dead hole in #2 about 50% of the time. Very consistant, it will idle smooth for awhile and then start to miss and then... Trouble codes: P0302 (Misfire cyl 2)
2001 Pontiac Aztek 3.4L compressor VIN: E41S548255
01 PONTIAC AZTEK came with no a/c; no codes; compressor not coming on. High pressure thru bcm (115 psi)1.4 volts ok; Bcm does read request a/c . Pcm shows no request; test serial data line 1-4 volts; ground wires sets u codes; test ground and power at pmc ok; ...
2001 Pontiac Grand Am GT 3.4L lacks power VIN: 1G2NW52EO1
This vehicle was brought to our shop because the customer was convinced she had a transmission problem after driving the car it was clear to me the car lacked power as if it was starving for fuel or the exhaust was plugged. I explained to her that her problem ...
2001 Saturn L100 2.2L Poor Idle Quality, Hesitation, Cuts out, Stall VIN: 1G8JU52F01
the problem has only happened once in two weeks i could not duplicate so i installed a data recorder and the vehicle left vehicle came back found that po122 in the memory but not setting a mil light i have checked all wiring from fuel tank pressure sensor to p... Trouble codes: P0122
2002 Saturn SL2 1.9L ignition VIN: 1G8ZK52472
I replaced the ignition switch and passlock module and car will not start.I have tryed to relearn system according to someone on direct hit dont seem to be working.I hope someone has some advise for me.THANK YOU

Fixes & Summaries for GM
Fix/Summary Answers
1996 Buick Park Avenue Ultra 3.8L hvac controller VIN: 1G4CU5213T
Disconnected the batt again and it went back to F.Thanks to all.
2001 Buick LeSabre Limited 3.8L MIL Lamp on VIN: 1G4HP54K41
Well i told the customer that the pcm needed to be replaced and he flipped. told him what all i had done to the vehicle but that was no good. he left and havent seen him since. i called the buick dealership and they to agree that its a bad pcm. thanks for all ... Trouble codes: P0300 (Random Missfire).
1995 Chevrolet Camaro Z28 5.7L No Start VIN: 2G1FP22P2S
Well after a long holiday week end I started retesting this problem child. I checked the injector resistance as some mentioned and they were all at 12.1 ohms. I scoped out the opti spark with the vantage again and all wave forms were square and uniform as the...
1998 Chevrolet Corvette 5.7L Blower VIN: 1G1YY22G3W
Well,no luck on this one. This car had been brought to the dealer and the customer installed new GM parts they recommended. My diagnosis was the same as theirs with no change. The control head is digital and the module is a solid state blower control with no r...
2000 Chevrolet Blazer LT 4.3L Starter VIN: 1GNCT18WYK
Thanks to all that replied, It turs out that it was the neutral safety switch. innitially i ruled it out cause the owner had it replaced within the last year with an oe part, but it went bad.. THANKS AGAIN TO ALL THAT HELPED
2002 Chevrolet Impala 3.8L MIL Lamp on VIN: 2G1WH55K52
thanks so much to everyone who replied. first of all the 1811 code was a seperarate concern, refered to transmission shop. now for the 171 lean code. vehicle ran fine idled fine but 171 would set upon light acceleration. cat welds looked fine no signs of leak,... Trouble codes: P0171 (Lean), 1811 (Trans).
2005 Chevrolet Silverado 3500 LS 6.6L temperature VIN: 1GCHK33295
Hi everyone and heres what we learned on Allisons. First of all-these do run warmer than some transmissions-220 degrees is not a problem and they do not go into fail safe till 185 degrees. Also we learned that completely clean radiators do allow more airflow a...
2006 Chevrolet Trailblazer SS 6.0L No Start VIN: 1GNET13H16
unable to fix at this time. customer saving money to have fixed at later date... i found corrosion under fuse block, but waiting for owner to autorize repairs. Trouble codes: P0689, P1516.
2000 GMC Yukon Denali 5.7L No Start, Stall VIN: 1GKEK13TX1
Big thanks to all the replied to this. I replaced the fuel pump and revised connector, and she's running like a new. I found I had high resistance at the connector causing amperage to exceed what the ECMb fuse was able to take.
1999 Oldsmobile Intrigue GL 3.5L Surge, Cuts out, Misfire
been a few weeks and not a word from the owner so going to call it fixed. check powers and grounds all ok checked the BCM and ?? so disconected the BCD and check the conectors all looked ok so reconected them and everything was working fine, scan data and al... Trouble codes: B2961, B0300.
1992 Pontiac Bonneville SE 3.8L No Start VIN: 1G2HX53L8N
Thanks for all the replies. We were not able to fix the vehicle, the student didn't have the cash for a PCM. The replies all had good suggestions, some things I had no previous knowledge of, such as a shorted injector would shut down all the injector drivers. ...
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