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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for April 16, 2010
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Open Help Requests for GM
Help Request Answers
2000 Buick Regal GS 3.8L Fuelpump VIN: 2G4WF5519Y
Can anyone tell me what this fuelpump should draw amperage wise. This car is supercharged and day one car would start and run for 10 seconds fuel pressure would drop from 55 to 10 while dying, after stalling could hear pump run and pressure back to 55, so we r...
2002 Buick LeSabre Limited 3.8L rear door window VIN: 1G4HP54K62
I have a 2002 Buick Le Sabre in the shop, came in with just the rear windows and door locks inop. Front doors operate as designed. It appears I have all the proper power and grounds at door modules. This vehicle does sit all winter is a vehicle used in the sum...
2004 Cadillac SRX 3.6L Flexplate VIN: 1GYEE63754
When the vehicle came in it had a broken flexplate. It appeared that the unit had been worked on before. Alignment dowels are in place. Flexplate was replaced with new from dealer. Owner was told by another shop that it is now making the same noise as before....
1985 Chevrolet S10 2.5L No Start VIN: 1GCCS14EXF
I have this S10 pickup that was towed in for no start. Test shows fuel pressure correct and fuel is getting to the engine. This truck has no spark. I found a wire in the 2 wire connector from the distributor to the coil had rubbed through and shorted and melte...
1994 Chevrolet C3500 5.7L turn signals VIN: 1GBHC34K9R
Left side turn signal flashes fast, all bulbs good,wire diagram I have shows 2prong flasher,vehicle has 3prong. Have replaced flasher with new a/c delco flasher same problem. Emergancy flasher works good,Thinking turn signal switch? What should I test next?
1996 Chevrolet Corvette 5.7L MIL Lamp on VIN: 1G1YY22PXT
Replaced distributor with Richporter brand (Yeah, I know, use Delco, but SM is a wierdo) Started car and immediately had P0336 CKP performance code. Code was not there before. Distributor was originally replaced for misfire. Replaced sensor on bottom of timing... Trouble codes: P0336
1999 Chevrolet Silverado 1500 LT 5.3L Auto 4X4 VIN: 2GCEK19T7X
Customer complaint of "whining" coming from front diff when 4wd engaged, changed all fluid and verified backlash on diff's. Wheel bearings are tight and universals are good. Is this indicatve of this truck?? Related problem- when auto 4wd button is pushed the ...
2000 Chevrolet C2500 5.7L cooling VIN: 2GCEC19T2Y
this truck has a5.3 engine and pfi not centeral injection truck is over heating only at idel temp. goes to 239 deg.on scanner when rev up engine temp.goes down to 195 deg took my thermo gun and pointed it at the thermostate housing at idel shows 195 deg thats ...
2003 GMC Savana 3500 6.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GTHG39U13
vehicle came in with random miss fire... when you start the car cold it runs fine after van warms up the right bank(cylinders 2-4-6-8) start missing.. good compression good spark to all cylinders.. tried swapping the injectors for the other side no difference.... Trouble codes: P0300
2005 GMC Sierra 2500 HD SLT 6.6L No power VIN: 1GTJK33255
For all you duramax gurus out there! vehicle came in with cel on ..customer complaint of lacks power wont accel over 2000 rpm. Has code 1093 for fuel rail psi. I realize that the code is causing the lack of power by default. the problem is intermittent though ... Trouble codes: P1093 (Fuel rail psi low during power enrichment)
2006 GMC Yukon XL 1500 SL 5.3L Hesitation, Stall, MIL Lamp on VIN: 3GKFK16Z22
Hello This vehicle has 45 psi fuel pressure.I have replace the fuel pump twice.Replaced fuel pressure reg. with after market.Pulled fuel rail and found no leaks.Pressure will hold at 45 for at least 45 min.Dead head pressure at filter was 500psi.Volume seems...
1998 Oldsmobile 88 Royale LS 3.8L Temp Gauge VIN: 1G3HN52K8W
Hi Y'all!! The temp gauge on OLDS 88 will drop to zero after warm up! It does stay full of coolant now and PCM shows ECT in range at all times (no code) for ECT. There is warning chime that sounds twice when this starts! I cannot access the body computer with ...
1996 Pontiac Grand Am GT 3.1L No Start VIN: 1G2NE52M8T
Need some help on this. I know its the anti theft system we,ll reset it andthen a week or so later start have problems again when you crank the car theft light flashs and the system shuts the fuel pump down is this a computer problem or a ignition switch probl...
1997 Pontiac Sunfire GT 2.4L MIL Lamp on VIN: 1G2JD12T8V
when i try a crank relearn the scanner says waiting for full throttle.tps is over 4.6v and says 99%.tried lots of times and it wont learn .any help would be appreciated.
2003 Saturn Vue 2.2L no gears VIN: 5GZCZ43D03
scaned code p1758, car was towed in with no forward or reverse gears. we have not worked on one of these but suspect a damage belt internally. most things state to replace case cover assembly??? why is this. and can this job be performed in the car or must the...
2003 Saturn L300 3.0L won't accellerate VIN: 1G8JW54R33
This is the car has been towed from shop to shop (3 to be exact)it was towed to me from the chev/saturn dealer it was diagnosed as a bad BCM from what I can find out is the dealer put a BCM in it and did not fix the problem, what we found was the TCM was full ... Trouble codes: U2106
2004 Saturn Vue 3.5L drivetrain VIN: 5GZCZ63404
I have a 2004 Saturn Vue that came in with what sounded like a brake warning indicator squeaking-checked brakes-no problem found-absolutely will not make noise in the air-will not start squeak until you reach 20 MPH-braking has no effect-does not get any loude...

Fixes & Summaries for GM
Fix/Summary Answers
1999 Cadillac DeVille 4.6L MIL Lamp on VIN: 1G6KE54Y1X
Will this one is fixed... Here's the story, The I check out all electrical wiring to solnoid and pcm. Current ramped vent solnoid and check control side voltage, also put the fuel tank pressure sensor on my Pico lab scope. Drove the car cold start with the Te... Trouble codes: P1646 (Control Vent Solenoid Circuit Problem).
1992 Chevrolet Corvette 5.7L speedometer VIN: 1G1YY23PN2
thanx to all who replied leo from south carolina had some good info i appreciate the phone call,goes to show people on this site are dedicated to FIXING vehicles. Asfar as the vette the comm ckt # 817 intermittenly short to ground. Remove dash to accsess ccm,r...
1997 Chevrolet K2500 5.7L No Start VIN: 1GCGK29R6V
Shortly after posting this request, I had an idea. I believed the crank sensor controlled the injectors and that it was causing my problem. The previous owner had replaced it and I had replaced the wiring to it. On a hunch, I backed it out of it's mount in ...
2002 Chevrolet Impala LS 3.8L No Start VIN: 2G1WH55K02
Well the Impala is working fine. Most of the responses I got were to check the ign switch real close before replacing the BCM. I guess the ign switch seems to be a common problem for an intermittent no-crank with this model. I actually cut the old Ign switc... Trouble codes: B2618.
2002 Chevrolet Silverado 2500 HD 6.6L Hesitation, MIL Lamp on, erattic shifting VIN: 1GCHK23142
thanks to Michael, Jimmy, Scott, Phil, Jesse, and Mark. what I found was that the class 2 line between the ecm and the aldl was shorted to voltage only in the on position. it was so little that it would just barely put the threshold voltage above the level a... Trouble codes: U1301 (class 2 data high voltge).
2005 Chevrolet Silverado 2500 HD LT 6.6L MIL Lamp on
Replaced the Fuel Pressure Sensor on the pass side fuel rail and problem has gone away thanks to all that helped. Trouble codes: P1093.
2002 Pontiac Montana 3.4L Stall VIN: 1GMDX13E22
Thanks for the replies. Each one could have been a fix. Abe and Gordon hit it on the head. A new ignition switch fixed this problem. Thanks again.
2003 Pontiac Vibe 1.8L shifting VIN: 5Y2SL62883
o.k guys the problem with this car was or transmission was counter shaft bearing exploded internally preventing transmission from working properly- the bad news - customer decided not repair tranny and traded car in to dealer .as far as the starting problem , ...
2004 Saturn Vue 2.2L cooling fan
Thank you all most of you said it was the resistor and it was. ordered the part will be here next week.
2004 Saturn Vue 2.2L Flashing headlight VIN: 56ZCZ23DX4
WOW! Thanks to all that Responded! It ended up being a Light Bulb in the Automatic lights. Everything is Fine now! The customer just called and said that everything is GREAT now. Have a GREAT day! Fred
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