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Prev Professional Automotive Repair Technical Discussions for May 5, 2010
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Open Help Requests for GM
Help Request Answers
2000 Buick LeSabre Limited 3.8L Battery VIN: 1G4HR54K4Y
I have this Buick that the battery gose dead intermitantly after sitting for 3-4 days, the car is hardly driven, after doing a draw test on the battery, I have no draw untel I open and close the trunk litely then I have a draw of .61amps if I close it firmly t...
1976 Chevrolet C30 Custom Deluxe 7.4L No Start, Stall VIN: TC5346B521
Help old school techs. customer has dually 1 ton in mint shape. problem is you must drive 50 miles on highway get off exit come to a stop truck starts to sputter then stalls.We replaced engine cust seems to think this did not happen with original eng,all fuel ...
1999 Chevrolet Express 3500 5.7L Hesitation, Cuts out, Stall VIN: 1GAHG39R9Y
This van came in with severe hesitation (had to be towed in). First thing I noticed was no check engine light even when performing bulb check (koeo). Checked codes and found what I listed. Also I should mention that with the hesitation was also severe backfire... Trouble codes: P0171, P0174, P0338
2003 Chevrolet Silverado 3500 6.6L Rear Hubs VIN: 1GCJC33183
Have a HD here that the customer complained of a vibration while braking. Isolated the vibration to the rear brakes. Installed new rotors (with new wheel studs to hold the rotor to the hub) and pads. Also installed new bearings and hub seals. Vibration is sti...
2004 Chevrolet W4500 Tiltmaster W4S042 4.8L zfuel guage, temp guage, speedometer, odometer. VIN: J8BB4B1444
Hi Folks, I am hoping that someone has run into this issue before. When the temp and fuel guages are working properly, the transmission shifts perfectly. Once the temp guage rises the fuel guage will also rise, the odometer flashes and the transmission will s...
2004 Chevrolet Trailblazer LS 4.2L timing VIN: 1GNDT13S65
thanks in advance...we need help on this one with aligning the timing marks on the chain drive...sets code PO017...myself and 2 other guys have tried aligning with no luck...i was wondering if we are missing something with a phaser or tensioner or something......
2006 Chevrolet Impala LTZ 3.9L A/c VIN: 2G1WU58186
Hello all techs. I have a 2006 Chevy Impala LTZ with a/c problem. Car came in with code P0532. Replace refrigerant switch. Customer drove for 1 day came back the next day with the same code and now a/c won't kick in at all. When I try to turn on the a/c, the l...
2006 Chevrolet Express 3500 6.6L No Start
Moderate flow in return pipe at rear of Engine. 1qt in 20 seconds. Replaced HP pump and regulator. Followed priming in alldata- let electric pump run for 2 min and then cycle key and crank, did 3 times. Get rail pressure max of 179 psi.If push 1st start bleede...
2007 Chevrolet Trailblazer LT 4.2L MIL Lamp on VIN: 1GNDS13S97
Truck came in with codes p0411 p2444. Performed air pump tests through solus. Pump works on and off soleniod on engine works on and off all hoses are perfect no leaks pump blows serious air straight up. Cleared codes road test 4 time through out the day all go... Trouble codes: P2444 (Air pump stuck on)
1992 GMC C1500 Sierra 4.3L engine VIN: 1GTDC14Z0N
The engine is makeing a top end noise and there is no oil getting above the camshaft... the bearings have been checked and are not spun, the passage ways look to be clear when using a bore scope to see and also blowing air through the gallies, the lifters are ...
1996 GMC Sonoma SLE 4.3L Mechanical VIN: 1GTCT19X4T
Typical Leaking Intake Gaskets. After Replacing Gaskets The Engine Turned Only 2 Or 3 Times And Fired Right Up. But, Slight Miss And This Noise That Sounded Like A Small Nut Or Bolt Was In The Cylinder. Miss When Away Shortly But Noise Remains. Oil Pressure Is...
2000 GMC Savana 1500 4.3L No Start VIN: 1GTFG15W7Y
This van was towed into our shop the other day for a no start condition. We found the ignition 1 fuse blown. Replaced the fuse, van started and ran fine. Checked for obvious things, wires in affected circuits that may have exposed wire showing. There is alot o...
2003 GMC Envoy XL SLT 4.2L Electronic VIN: 1GKET165SX
I am a Nissan tech that was asked by a friend to look at this Envoy. The owner complained about a noise in the rear suspension over bumps from the right rear. A inspection of the rear suspention showed now damage or worn suspension parts. After driving at leas...
2005 GMC Yukon XL 1500 SLT 5.3L ride control VIN: 1GKFK16Z35
I have this gmc truck with a service ride control light on with a co 660 stored try to clear with snap on solus will not clear I also tried to perform manual test with scanner it will not power compressor if I power compressor it will work! All data is not muc...
2001 Oldsmobile Aurora 3.5L starting/pcm power VIN: 1G3GR62H01
very intermittent no start condition, every time the customer brings it here, it will start all day long with no codes, no hiccups, no other indications. Yesterday it refused to start so I headed over to the customers house, finally I could get a bit of a lead...
2001 Oldsmobile Aurora 3.5L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G3GR62H61
came in with poor idle and ses on some times it was off at this time found #5 misfire only at idle swaped coil plug boot and injector still misfiring on 5 has only 10% leakdown i am lost now please help Trouble codes: P0300
1992 Pontiac Bonneville SE 3.8L No Start VIN: 1G2HX53L8N
This car came in as a no start. Ignition system is functioning normally. The vehicle attempts to start as it cranks, but doesn't. The injectors pulse three times while cranking and then the control signal goes to steady battery voltage on the scope as it conti...
1999 Pontiac Grand Prix GTP 3.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G2WR5215X
Good evening all! I believe we have a problem with a sticking exhaust valve in this car and before we go further I would like to see if any one else has seen this. The background: car was brought into us to replace a leaking rear valve cover. This was done a... Trouble codes: P0304
2006 Pontiac G6 3.5L MIL Lamp on VIN: 1G2ZF55B86
Vehicle comes in with a check engine light on. Retrieve dtc of p0128. Tstat temp low. I can view the pcm data & the pcm is seeing good ect temp, its 195 fully hot. Even the freeze frame data shows temp of 185. My question is how does the system work? does the ... Trouble codes: P0128 (Tstat temp low)

Fixes & Summaries for GM
Fix/Summary Answers
1989 Buick Century Custom 3.3L Cuts out, Stall VIN: 1G4AH51N7K
Thanks to all of you who replied to this help post. I only got to look into this car for about an hour today and I eliminated the following. Coils and all related ignition components. maf sensor and the pcm. injectors. I suspect the fuel pump as some of y...
1999 Chevrolet S10 2.2L lo beam lights VIN: 1GCCS1446X
HI Y'all!! Thanks for all your help! I did have 12 v to the headlights. It was bad ground yellow wire at the under the dash at the connector! ONce I was able to figure that out it was fairly simple! Was able to repair and let there be light! Back to the bas...
2005 Chevrolet Silverado 2500 HD LS 6.6L abs module VIN: 1GCHK23205
I replaced the left front hub assembly and road tested that fixed the problem. Thanks to everyone for the good information
2006 Chevrolet Trailblazer LS 4.2L Abs VIN: 1GNDT13S46
Took vehicle to dealer to flash EBCM but still had no communication further diagnosis found corrosion in wire where insulation was damaged in harness under ABS unit at 12v power feed to EBCM pin 2. battery voltage was present, but not sufficient current to all...
2004 GMC Sierra 2500 HD 6.6L MIL Lamp on, Will not accelerate VIN: 1GTHK292X4
Thank you to all who replied on this 2004 GMC 6.6L showing code p207. Your assistance with cylinder numbering, location of the FICM and alerting us of TSB 05-06-04-047C was very helpful. Upon unplugging the wiring harness to cyl. #7 fuel injector, then plugg... Trouble codes: P0207 (Cyl. 7 inj. Circuirt problem).
2004 GMC Sierra 3500 6.6L fuel pump/guage VIN: 1GDJK3417E
thanks guys for all your help.i sincerely could not do this without you guys.we replaced the cluster and both senders,had the local dealer program it and shes golden so far.thanks and GODBLESS.
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