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Prev Professional Automotive Repair Technical Discussions for June 5, 2006
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Open Help Requests for GM
Help Request Answers
1997 Buick LeSabre Custom 3.8L fuel gauge VIN: 1G4HP52K2V
Vehicle runs out of gas at 1/4 tank,put in 2 gallons of gas and reads over 1/2 tank. replace sending unit and still reads over 1/2 tank. Both sending units are AC DELCO parts. When we move the arm out of the gas tank we can get it to rear empty and full. Anyon...
2002 Buick LeSabre Limited 3.8L Starting VIN: 1G4HR54K72
keep gettin a b3055 key not present. did the key relearn a bunch of times, same code got master key from the cust. and still same thing. wondering if im just not doing something right. I asked the cust if he might have tried to jump start the car and crossed t...
1988 Chevrolet Celebrity 2.8L Poor Idle Quality, Stall VIN: 1G1AW81W8J
customer complained of stalling at stop lights. I scaned vehicle found no codes and a lot of strange readings on test data replaced ECM started engine scaned it got no responce tured off then on engine not running scaned and got o2 codes replaced o2 scaned aga... Trouble codes: 13 (o2 fail), 61 (o2 fault)
1998 Chevrolet K1500 Suburban LS 5.7L MIL Lamp on VIN: 3GNFK16R3W
I am at a loss with this suburban. The check engine light keeps coming on with a code P0442, small evap syst leak. I have leak tested the system 3 different times using a tech 2 to seal the system and a motorvac evap system tester to pressurize the system with... Trouble codes: P0442
2001 Chevrolet C3500 HD 8.1L fuel gauge VIN: 1GBJC34G11
How does this system work? Our shop key info on this system goes right around the 2001 model year!!!My info shows a module on the frame rail,this vehicle has an ABS pump right where the module is suposed to be.does anyone know if the 2001 model year has a diff...
2001 Chevrolet Suburban 1500 5.3L shift cable VIN: 3GNEC16T41
The shift cable wadded up inside the housing on this one. The first cable the dealer sent me would not even slide together in the adjustment section. This is a two peice cable with the adjuster in the middle. I called the dealer back with the numbers of the ca...
2002 Chevrolet Tahoe LS 5.3L Excessive Emissions, Stall, MIL Lamp on VIN: 1GNEK13Z42
Hello everyone, this Tahoe will intermitantly run rough and very rich at times and also stall, it does it mostly at idle but will stall while driving also. The MAF sensor code repeatedly come back after it does this. I tested the maf it it tested OK all power,... Trouble codes: P0101 (maf sensor performance)
2003 Chevrolet Malibu LS 3.1L No Start VIN: 1G1NE52J13
This vehicle is a no start with no injector pulse. The security light was on when it cam in and we replaced the ignition switch and lock cylinder. After relearn, now the security light is out but we still don't have injector pulse and we still have a code U100... Trouble codes: U1000
1995 GMC C1500 Sierra SL 5.7L Poor Idle Quality, Hesitation, Stall VIN: 1GTEC14Z9S
This truck displays everything on scanner to be good except o2 volts that goes from 4 mill volts to 463 back to 9 & then 820 & back to 4. All in a heart beat. As fast as the scanner can go.Replaced cheap o2 sens with delco. Have checked o2 sig circ for open or...
2000 GMC Yukon Denali 5.7L fuel gauge vibration VIN: 1GKEK13R8Y
Called the Tech Line and they said that the PCM PWM's the signal to the fuel gauge after receiving the information from the Sending Unit in the tank. They said that the PCM has an internal buffer that will "clean-up" the PWM signal to the fuel gauge. According...
2000 GMC Jimmy Diamond Edition 4.3L alarm system VIN: 1GKDT13W6Y
Hello all, not quite sure where to begin. The only thing to tell you is every once in a while (maybe once every two weeks) when parked, after several hours, usually engine cold, the factory alarm will sound, (horn)and lights flash. The last time was after a he...
1978 Oldsmobile Cutlass Vista Cruiser 4.3L Alternator Light VIN: 3R47F82453
I remember GM had a fix for the alternator light being on dim all the time but due to getting old I do not remember what the fix was for it. Seems like it had to do with changing the lens over the alt light to a darker one.
2001 Pontiac Grand Prix GT 3.8L Hesitation, Cuts out VIN: 1G2WP52KX1
This vehicle came to my shop complaining of loss of power if accelerating. I checked fuel pressure and flow ok. I hooked up scanner no codes present. I test drove the car if you accelerate lightly it runs good. If you accellerate above 2000 rpm it starts pingi...
2000 Saturn LW2 3.0L Lean code VIN: 1G8JW82R2Y
This car was purchased about 3 months ago, but the condition has only been happening for the last month or so. I have confirmed fuel pressure in spec, checked EGR passages and response to commanded inputs from scan tool. The evap has a noticeable impact on idl... Trouble codes: P0171 (Lean condition Bank 1), P0174 (Lean condition Bank 2)

Fixes & Summaries for GM
Fix/Summary Answers
1992 Chevrolet S10 2.5L Hydraulic VIN: 1GCCS1A1N8
I removed the entire assembly and bleed it with the slave at the lowest point. This did not help. I then removed the slave and held it with the bleeder end up and pushed the rod in about 20 times to back bleed it. This helped but still was not good enough.Then...
1998 Chevrolet Blazer 4.3L No Start VIN: 1GNDT13W6W
oh GM!!, we end up decided to replace another fuel pump from dealer, the 3rd one end up fix this vehicle. It's hard to believe but this is just the truth. THanks again for all your replies and advices.
1999 Chevrolet Silverado 1500 5.3L MIL Lamp on VIN: 2GCEK19T2X
Thanks for your replies.Replaced the intake gasket and after a long test drive the symptom slowly went away. I beleive it was a combination of dirty injectors and intake leak. I wonder how much damage the converter receives with this type of misfire that you c... Trouble codes: P0300 (multiple misfire).
1999 Chevrolet Tahoe LS 5.7L starting VIN: 1GNEC13R6X
we are calling this item fixed...although the jury is still out...we replaced both switch and lock cylinder due to the majority of opinion(9 replies)...most all stated to replace has been a week since customer left and no failures since...we are pu...
2000 Chevrolet Monte Carlo LS 3.4L No Start VIN: 2G1WW12E9Y
Hi All, This one is now fixed. I replaced the lock cylinder. After I installed the lock cylinder the vehicle would not crank. I went through the programming that some of you guys suggested. (Turn the key to the start position and then leave it in the run posit...
2002 Chevrolet Express 3500 5.7L braking system VIN: R621111473
Hi everybody, we fix the pulling problem by replacing the 2 front caliper!!!, they were changed last year / 80000 km ago for routine brake repair. I dont have the time to open them to see whats going on but... its fixed. Thank you again for all the good repl...
2000 GMC Savana 2500 5.7L high idle
The replies I received hinted at a computer connection or wire problem. I rechecked the wires at the IAC motor and found a broken wire inside the insulator causing my intermittent problem. Fixed the wire, cured the problem. Thanks for your help. Trouble codes: P0507, P1509.
1996 Oldsmobile Aurora 4.0L radiator fans VIN: 1G3GR62C1T
There was a small crack in the radiator tank.Replaced tank seems to be ok.Thank you all.Also replaced cap.
2000 Oldsmobile Bravada 4.3L transfer case VIN: T2Y1158522
well this one is down the road,this transfer case was a sigle speed that is automatic 4wd.after reading replies and talking to local dealer we changes the fluid with gm #[...] said it might take changing 2 times to clear up but after 25-30 mile...
1998 Pontiac Firebird 5.7L a/c system VIN: 2G2FU22G9W
Thanks for all the replies. System had a blockage in the lower hose from the receiver dryer to the compressor. I think it was most likely collapsed internally. Funny that it wasn't freezing up though. It goes from the dryer on the passenger side all the way ov...
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