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Prev Professional Automotive Repair Technical Discussions for July 28, 2008
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Open Help Requests for GM
Help Request Answers
1992 Buick Regal 3.8L No Start, Poor Idle Quality, Hesitation, Stall, Misfire VIN: 2G4WD54LON
Ok It came in and I never was told it has been running with no cam sensor signal /ses light on since customer bought it. It ran bad day before brought in , then ran fine when I got it. BUT tape over SES light, cam sensor code, told to ignore it so I took it fo... Trouble codes: 41 (cam sensor), 42 (est)
1995 Buick Century Special 3.1L MIL Lamp on VIN: 1G4AG55MXS
this 95 century came from a local used car dealer. it misses/stumbles during hard accel. it runs great until you really get on it. at high rpm during hard accel it suddenly starts to miss and then turns on the mil and sets a code 341. it feels kind of like a r... Trouble codes: 341 (cam signal)
1999 Buick Park Avenue 3.8L not sure VIN: 1G4CW52K7X
car originaly brought in early june/low on freon found no leaks.refilled and sent it on its way.came back early july blowing warm. 1/2 lb low but again found no leaks [ dye was installed at original service ]. seemed to cool ok but before it left our lot it be...
2002 Buick LeSabre Limited 3.8L blower motor VIN: 1G4HR54K02
we have this lesabre with no blower - we have power and ground but no 5v pulse width . getting to blower comtrol processor have power coming out to motor but no ground to motor can manualy supply ground but no diff . on blower speed control wire coming out of ...
2001 Cadillac DeVille 4.6L 1-2 down shift VIN: 1G6KD54Y32
Ok all of you cadillac tech,I have a deville that is kicking my butt. This car set a code PO742 tcc circuit stuck on.I replaced the tcc solenoid and let the car go.Three weeks later its back.Has anyone seen this?If so could you point me in the right direction....
2004 Cadillac Escalade 6.0L Gas Gauge VIN: 1GVEK63N34
Hello to all, I have this Esco in here and the fuel gauge jumps all over (espcially when filling with gas). It will spin 360 degrees and the needle will point to the bottom side of the gauge, off the scale. I have doone a few of these and it has been the sendi...
2004 Cadillac SRX 3.6L No Start VIN: 1GYEE63784
intermittent no crank, key will then be stuck in ign. switch (key will turn but not come out). When this happends there is no check eng. light on and no communication with the ECM (you can comm. with all other modules). After awhile when it cranks and starts t... Trouble codes: P0700 (code in TCM), P1832 (pressure control solenoid circuit high), U0100 (lost comm. with ECM/PCM)
1992 Chevrolet C1500 Cheyenne 4.3L No Start VIN: 1GCDC14Z5N
Thanks for taking the time to read my post. We are having problems with this throttle body injection C1500 truck with manual trans.. We know that the pulse width at the injectors are too low. Its at about 2.00 milliseconds during starting when we think it shou...
1998 Chevrolet Express 2500 LS 5.7L alarm / passlock VIN: 1GCGG25R7W
well, i just replaced the ignition lock cylinder because it was acting up, due to the high milage. well, after tearing the whole column down to get to the lock cyl, all is well, except now it wont start. i tryed leaving the key on for 30 min off for 30 min 3 t...
1995 Pontiac Bonneville SE 3.8L lack of power VIN: 1G2HZ52K3S
vehicle runs fine at idle, but when driving spark advance goes to 0 and knock retard goes to 13-15
2004 Pontiac Grand Prix GT2 3.8L Blower Motor Module VIN: 2G2WS52294
This 04 grand prix came in the shop for a blower motor that would run on high all of the time and with the key off. Tested the blower motor module (resister) and found it was powering up the blower motor all of the time. Replaced the module with a A/C Delco fr...

Fixes & Summaries for GM
Fix/Summary Answers
1987 Buick Electra Park Avenue 3.8L No Start VIN: 1G4CW5137H
Thanks to everyone one who posted a answer to this stubborn 3.8. All of you played a important role in solving the problem. The fix was replacing the pigtail to the control moudle and somehow the magnet in the cam interruptor was in wrong. I pulled it out of t...
1997 Cadillac DeVille 4.6L engine VIN: 1G6KD54Y9V
Checked the cooling system for combustion gases. came out positive. Took the engine apart and a couple of head bolts had pulled out of the block. Most of you guys were right about the treads holding in the head bolts.I repaired the threads and machiced th...
1998 Cadillac Eldorado ETC 4.6L blower motor VIN: 1G6ET1296W
Hi everyone, I would like to thank everyone that sent me information. Your answer was correct. The blower motor was the problem. I did check for power at the blower motor which was correct. I also checked the signal which was also correct. The blower motor did...
1999 Chevrolet Monte Carlo LS 3.1L abs VIN: 2G1WW12M9X
well this car is fixed the problem was the left tone ring was cracked and replaced as stated i also found the harnes had a broken wire where the harness passes thru the inner fender as far as the difrent codes between the 2 scanners im sticking with the tech2 ...
1999 Chevrolet Astro 4.3L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Poor Fuel Economy VIN: 1GCDM19WXX
Found out the cat. converter was parcel plugged and did the dist. to adjust timing helped. thanks all for the helpful info. another headache gone.
2000 Chevrolet Silverado 1500 5.3L Mechanical VIN: 1GCEK19TOY
Our scan tool does not have the capability to bleed brakes. We have tried everything else that has been suggested (at least once!). This solution seems to be the consensus. We have ordered a new scan tool which will be able to perform these functions so hope...
2005 Chevrolet Monte Carlo LS 3.4L Misfire, MIL Lamp on VIN: 2G1WW12E65
2006 Chevrolet Uplander LS 3.5L no crank VIN: 1GNDV23L16
The good news is this one is fixed. It killed me to wait a couple of days to verify this before posting the fix. The PCM was bad. Kirt [...], you and I must think alike. About the time I got your Email about cooling the PCM with a blower I had just come inside... Trouble codes: U1000 (Class two serial communication error).
1998 GMC C-7500 7.2L Will not crank via ignition switch VIN: 1GDM7H1C8W
Wire starts at ignition switch as yellow,changes to grey at the clutch interlock switch[none on this vehicle-factory jumper in its place],purple out of this connector to the fire wall. at fire wall changes to orange-black to starter over crank thermostat[none ...
1999 GMC Jimmy SL 4.3L a/c compressor VIN: 1GKDT13W0X
Greeting's fellow tech's. - Thank's to Ron from Alabama I figured that I had better have another look @ the ambeint temp. sensor. - My scan tool does not read amb. temp., it only gives me a/c request & a/c comp. command (on/off). - I assumed that even though ...
1997 Oldsmobile LSS 3.8L tcc VIN: 1G3HY52K9V
well like they say, the shoe makers kids never have shoes, and mechanics drive around the vehicles that need the most repair, I have other cars and don't have extra $$$ for parts, I have been told by many many many people that the solenoids for lockup and line...
1989 Pontiac Firebird 5.0L Starting VIN: 1G3K28RS55
Man, you guys sure know your stuff! The best advise here I got.. to check the resistance at the two wire harness from the ignition cylinder with the key in the ignition clyinder. I figured out that I had a code 8 key with a resistance value of 2,370 ohms. W...
2001 Pontiac Grand Prix GT 3.8L Monitor reset VIN: 1G2WP52K51
I am closing this post as somewhat fixed, but I am going to carry this car over to the forums. Cat was changed with OEM and car was given back to customer to drive for an extended period to set monitors. It came back 10 days later and all monitors were set exc... Trouble codes: P0420 (Cat efficency low).
2007 Pontiac G6 GT 3.5L MIL Lamp on VIN: 1G2ZH58N97
Hi Everybody, Thanks to all who replied, Michael [...] and Bobís Motor Workshop. All replies were helpful and informative and helped because my info for 2007 was sketchy. What I found was that the 12v power wire a... Trouble codes: P0102 (low or no mass air flow signal).
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