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Prev Professional Automotive Repair Technical Discussions for January 21, 2009
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Open Help Requests for GM
Help Request Answers
1999 Cadillac Seville STS 4.6L abs VIN: 1G6KY5496X
Hi guys have any of you experianced that when the abs has been activated a few times the 40 amp fuse under the hood would blow.Would the abs pump cause this?Don't know much about abs.Any help would be thankful.
1996 Chevrolet Blazer 4.3L MIL Lamp on VIN: 1GNDT13W9T
hi to all this blazer came in with a po122 code tps volt low ,so we replace the sensor same code then we trace the wires from the tps back to the computer clean all connector and same problem ,any help i will appreciate Trouble codes: P0122
1997 Chevrolet Express 2500 5.0L rear brakes VIN: 1GCFG25M1V
Hello All, This van has no brake fluid going to the rear wheels. I have fluid and good presure at the ABS controller under the vehicle. The ABS is functioning and scanner shows speed from front and back wheels. There are no codes in system and all brake lines ...
1999 Chevrolet Astro 4.3L Electronic VIN: 1GNEL19W0X
This van has a code C0310 encoder motor A/B circuit open. The service AWD light comes and goes. I have replaced the encoder motor with no change. When the light is on and I clear the code I hear what sounds like a relay clicking inside the automatic tranfer ca...
1999 Chevrolet Blazer 4.3L Misfire VIN: 1GNDT13W1X
1999 Chevy Blazer Vin # [...] 4.3 A/T 4 wheel drive Used engine installed. Completed 1/12/09. Car ran perfectly for 40 miles than developed a miss. Codes P0300 and P0302 present. Upon inspection with scanner major misfire occurring on cylinder 2 w... Trouble codes: P0300 (Random misfire)
2003 Chevrolet Impala 3.4L Unknown VIN: 2G1WF52E33
After driving this vehicle for a while 10- 15 mins, the "theft" light comes up in the display. I have only verified this once. I have retrieved code P1626. I have mitchel and have followed the pinpoint test which there is not many steps and it says to replace ...
2004 Chevrolet Malibu 2.2L Poor Idle Quality, Cuts out VIN: 1G1SF23368
car does not idle good .when put in drive car wont move in park engine revs when pedal is pressed scanner indicates app switch at pedal is working tps reading stays at 35% all the time posted yesterday didnt enter right code really lost on this car any help gr... Trouble codes: 1682 (ignition circut), 2101 (tps circut)
1999 GMC C7500 7.4L Starting VIN: D2XJ516532
this truck have intermitent probleme,you can start the engine with no probleme,and sometime it crank good but no start with back fire in exhaust like the timming was wrong,i replace fuel pump twice tinking it was my plobleme same issue,check cam and crank sens...
1999 GMC Jimmy SL 4.3L Unknown VIN: 1GKDT13W9X
This is our accountant's vehicle. We're a Volkswagen/Audi shop so do have too much knowledge with these beauties. The complaint is that when backing up it feels like it's in 4WD. This is an intermittant fault. Went for a drive today & the fault was not present...
1999 GMC Safari SL 4.3L anti theft VIN: 1GKDM19WOX
Hi Van was towed in as a no start spark and fuel presure are good it is loosing injector pulse Security lamp is on steady . computer has two codes 1626 and 1192 cleared codes and 1626 comes back as a hard BUT every so often it will start till I shut it off the...
2002 GMC Envoy SLE 4.2L head gasket VIN: 1GKDT13S32
truck came in with oil leak in lt front corner of cylinder head between block and head removed head and sent out to be checked and resurfaced and reassembled and engine started leaking oil after a 10 mile test drive. same spot rt. front corner added dye and se...
2003 GMC Sierra 2500 HD SLE 6.6L Starter & PCM VIN: 1GTHK23183
Greetings GM techs. This one was our last project for the day and I'm still here at 10 at night. Came in for rear brake pads & rotors which went fine but when we came to start it and run it out for a road test it wouldn't crank. Full battery voltage available ...
2006 Hummer H2 6.0L MIL Lamp on VIN: 5GRGN23UX6
Vehicle initially came in with an MIL and code P0446 (EVAP vent control problem). Checked the operation of the purge and vent valves, both clicked when commanded on. Smoke tested the entire EVAP/fuel tank and found no leaks. When the vent valve was commanded o... Trouble codes: P0446 (EVAP Vent Control Problem)
2001 Oldsmobile Alero GL 2.4L Poor Idle Quality VIN: 1G3N52T41C
have an 2001 old alero that came in with a stalling problem at idle. run fine going down the road. pulled air cleaner housing off throttle body, found it heavily carboned up. cleaned out throttle body, pulled iac motor off cleaned off around the iac housing an...
2001 Oldsmobile Alero GL 2.4L Poor Idle Quality VIN: 1G3N52T41C
hi guys i went to add some updated information and ended up closing the request so here it is again. 01 old alero came into the shop with an stalling at idle when warm. run fine going down the road. pulled off air cleaner housing and found the throttle body he...
1992 Pontiac Firebird Trans Am 5.0L Poor Idle Quality, Hesitation, Cuts out, Stall VIN: 1G2FW23F3N
this car runs great at idle. acts like its starving for fuel. everything under the sun has been replaced. COIL, DIST, FUEL PUMP, FULL TUNE UP, TPS. IAC, .. IF YOU PLAY WITH THROTTLE YOU CAN GET THE RPM'S UP PRETTY GOOD.. BUT IF YOU GO FULL THROTTLE IT FALLS ON...
2000 Pontiac Grand Prix SE 3.8L starts and dies VIN: 1G2WJ52K5Y
Greetings techs,I'm in over my head on this security system.Every time I think I understand how GM security systems work I run into a new version and I'm lost again. This Grand Prix has PasskeyIII, meaning the key has a transponder in the head of the key rathe... Trouble codes: B2960
2008 Pontiac G5 2.2L dlc VIN: 1G2AL18F08
Vehicle involved in a frontal collision. Impact area left front. Air bag drivers side deployed. Air bag module, clock spring, seat belts affected, and control module replaced with new as well as the front impact sensor which showed some impact damage. Vehicle ...

Fixes & Summaries for GM
Fix/Summary Answers
1999 Cadillac Seville SLS 4.6L fog lamps VIN: 1G6KY54927
finally got this one fixed and have to say thanks for all the replies especially bill from michigan for sending me a good wiring diagram of this system it turns out that it had a broken green and white wire to the dim module out of the underhood junction block...
1995 Chevrolet Cavalier LS 2.3L Excessive Emissions, Misfire VIN: 1G1JF32D3S
I want to say thanks to everyone that helped and gave me advise with this pain in my a$$. The problem ended up being the igntion coils. I swapped the first time with oem parts and problem still occured. So I decided to try two more new one and its fixed.. ...
2003 Chevrolet Silverado 3500 8.1L No shift, No communication w/TCM VIN: 1GCJK39GX3
After spending hours and hours testing powers and grounds every way possible I found it. The battey wire to pin 3 on connector C1 at TCM had been probed with a pull & punture style probe and the wire had a section about 3" long that had corroded and was causi...
2004 Chevrolet Cavalier LS 2.2L water pump drive VIN: 1G1JF52F94
Thanks to all who inquired.The problem was that the balance shaft[aka]waterpump drive chain became derailed.Found chain guide pieces all over the place.When I pulled the v/cover off I thought I was looking at a chrysler 2.7 based on all the sludge built up.Wha...
2002 GMC Envoy SLE 4.2L Unknown VIN: 1GCMK46MD2
Thanks for the replies. It turned out to have a very out of balance drive shaft,i dont know how it got so out of balance but that seemed to cure the problem thanks all.
2003 GMC Sierra 2500 HD SLE 6.6L Unknown VIN: 1GTHK23183
I have not found the problem yet.My customer needed his truck back for a few days.I should get it back Monday.Sometimes you get so wrapped up in a problem you need to step back and take a fresh look at the problem.Reading your replies makes me reevaluate what ...
2005 GMC Sierra 1500 SLE 5.3L Electronic VIN: 2GTEK13T85
Thanks to all of the replies. I replaced ignition switch to repair. The customer has had truck back for week and a half now and its working great.
2006 GMC Envoy XL SLT 4.2L atc VIN: 1G4F262718
thanks too all for the help it turned out 2 be a bad encodermotor new is not always good
1990 Oldsmobile Cutlass Supreme 3.1L Hesitation, Surge, Cuts out, Stall VIN: 1G3WH14T5L
Thank you to all the tech who replied to my help. I think that i did take care the problem. It turn out to be the new defective tps that i replace. When i removed the tps connector, idle become normal. I go ahead got a different new tps, and now I think it i... Trouble codes: 035 (idle air conntrol error).
1998 Pontiac Grand Prix GT 3.8L ABS Module VIN: 1G2WP52K6W
Talked to Snap on Rep. He was unaware of other complaints of compatability issues on this vehicle. I was looking for help on the communication problem. Customer is gone for 2 weeks vacation, so I figured I had some time to collect some ideas. I am going to re-...
1999 Saturn SL2 1.9L abs VIN: 1G8ZK5276X
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