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Prev Professional Automotive Repair Technical Discussions for February 11, 2010
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Open Help Requests for GM
Help Request Answers
1995 Buick Regal 3.8L oil pressure sender VIN: 2G4WB52L9S
The oil pressure sending unit has been replaced 3 times, by three different shops using three different brands. We replaced the last one with a new GM OEM unit. After 3 or 4 days the sending unit begins to leak oil through the top center of the unit. It spews...
2003 Cadillac DeVille 4.6L Surge, Misfire, MIL Lamp on VIN: 1G6KD54YX3
Just wondering if anyone else has experienced this "No Joy" condition on any of these Northstar Engines. I have already replaced both Upper & Lower CKP Sensors with brand new GM Parts, still setting DTC P0385 CKP Circuit B. Engine also has intermittent slight ... Trouble codes: P0385 (Upper CKP Sensor B Circuit)
2004 Cadillac SRX 3.6L unknown VIN: 1GYDE63744
Hello all techs : I have this caddy in the shop complain big loud noises under take off acceleration. the noises is around the middle of the car. The noise will only happen at take off,and will goes away after driving. The noises are similar to a worn out c.v...
1992 Chevrolet Lumina 3.1L Cuts out, Stall, MIL Lamp on VIN: 2G1WL54TXN
this car idles fine when driveing after about a mile when comeing to a stop it will run out of fuel cut out but it will start rite up and go guys i thinking its the ecm on this on the fuel pump is getting power but when been driven after a mile or so lose of f... Trouble codes: 54 (fuel pump voltage low)
1993 Chevrolet C3500 Cheyenne 5.7L No Start, Cuts out VIN: 3GCJC44K9P
itry good distributor,pcm, a new ign coil tested charging system is good , i trase for a short cant find any short, i cut the rpm wire coming off coil to cluster to see if the shorth is in the ckt didnt help this truck start right up w/ new module and runs g...
1997 Chevrolet Cavalier 2.2L No Start VIN: 1G1JC124XV
Hi Cranks and no start. Floods the plugs big time. I know that it is a lack of vacuum going to MAP. It was running great one day then no start the next. I can put a vacuum pump on extra MAP and get it to start and run. Garage I am trying to help did valve job...
2001 Chevrolet Tahoe LT 5.3L No Start VIN: 1GNEK13T01
This Tahoe will crank but not start at times (once a month) but never when in my shop. If you let it sit for 10 minutes it fires right up. No codes in the computer problem will occur cold as well as warm. It won’t even try to start when it acts up and yes the ...
2002 Chevrolet Express 3500 5.7L p1356 VIN: 1GBHG31R22
It seem like it is a soft code but my customer told me that it didnt have check engine light on before engine went. I tested the distrupider and all the sensors. I set the timing and I can figure it out
2004 Chevrolet Aveo 1.6L Poor Idle Quality, Surge, Stall VIN: KL1TJ62604
Ok here we go. Customer (car lot) drove this car in. Purchased it with front end damage and not running due to accident. They had to repair the body replace wire harness , ECM , spark plugs, and wires. Running condition of tyhe vehicle before accident is unkno...
2005 Chevrolet Trailblazer EXT LT 4.2L Differential VIN: 1GNDT13505
Hey, hopefully someone can help. I am doing an engine swap on a 05 trailblazer 4.2l. I have the engine out and am trying to remove the differential from the oil pan. Its a Wisconsin vehicle so every thing is rusty and corroded. I already broke the intermediate...
2006 Chevrolet Cobalt LS 2.2L headlights VIN: 1G1AL15F06
This a request for informationon on the turn signals affecting the headlights. A friend of mine has a 2006 Cobalt which when the hi beams are on and the left turn signal is used the headlights go OUT, does not do this on lo beams, I am thinking Turn signal swi...
2008 Chevrolet Trailblazer LT 4.2L remote security VIN: 1GNDT13S58
To all; does anyone know if there is a way to program remotes without factory scan tool? My customer bought this car used and has no remotes, would like me to supply new ones, but I cannot find programming information. Thanks, Artie
1993 GMC G3500 Vandura 5.7L Electronic VIN: 1GDKH32K2P
Hello all would like to pick your brains, mine isn't working. We have this big ugly cube van we put a used engine and a rebuilt trani in it. Worked great for 2 months then started to flaire up in 4th gear while hitting bumps,thats right bumps, if the road is s...
2000 GMC Sonoma SL 2.2L cooling system VIN: 1GTCS1955Y
hi guys, have a real headache here. 2000 gmc sonoma w/2.2l engine. this truck will not heat up. when i say heat up i mean it will reach around 150 degrees and that is it. customer original complaint was no heat generated in cab. we test drove vehicle and foun...
2004 GMC Sierra 2500 6.0L noise VIN: 2GTEK19204
hi, this 6.6 turbo diesel has a gurgling noise back thru the airfilter housing when u shut the engine off, only last a few seconds, no other symtoms, codes, complaints, customer bought new, as we usually refer diesels away we thought might check with u all, fo...
2003 Pontiac Grand Prix SE 3.1L dome lights VIN: 1G2WK52JX3
hi all i have problem with this 2003 pontiac grand prix.the dome lights staying on.i replaced bcm and was good for a couple days. then thay started staying on again.will time out about 15 min.tested power and grounds at bcm all check ok.any one run in to this ...
2006 Saturn Ion-2 2.2L Stall, Misfire VIN: 1G8AN15F86
Customer came in after car started misfiring when leaving carwash. She said she reved the engine and then it went away. she brought it right over and I pulled a p0300. So I started by dumping a bucket of water on the engine since it ws running fine. it started... Trouble codes: P0300

Fixes & Summaries for GM
Fix/Summary Answers
2003 Cadillac CTS 3.2L Ign. key/ shifter/ class 2 data/ modules VIN: 1G6DM57N73
Thanks to that replied. It was ECM, I also replaced the RIM (had a burnt leg at solder for a capacitor.Replaced The 2 modules and reprogrammed with Tech 2. I also got customer to replace battery, because it should be group 101 and it has 78 in it. Thanks again...
2008 Cadillac Escalade EXT 6.2L wiring
Replace harness for headlamps etc. 129.00 plus 1 hour
1968 Chevrolet Corvette 7.0L wipers VIN: 1946785421
Thank you everyone for your help. Epecially you Chris in California! It's funny but when I hadsubmitted this request, I had been beating my head against the wall for 3 weeks on this car. There were 3 problems, everything I replaced fixed something. The ground ...
2000 Chevrolet Blazer LS 4.3L Misfire VIN: 1GNDT13W1Y
I want to thank all of you who responded, you are all great people. This blazer has been a nightmare, but I got it. The trick was to determine weather the problem was fuel or ignition. I was fortunate to have another blazer I could switch parts. Many of you s... Trouble codes: P0300 (multiple miss-fire).
2000 Chevrolet S10 4.3L master cylinder VIN: 1GCDT14W8Y
thanks for the advice, the booster rod seemed to be hanging up the master cylinder and it was after market brand new master cylinder. I could not see where the rod was adjustable. OEM listed two different masters for the truck depending on the vin, but after m...
2001 Chevrolet Blazer LS 4.3L Unknown VIN: 1GNDT13W11
Most every one was dead correct. The front seal of the transfer case was hard as a rock and split in several spots. We replaced seal, vacuum switch on top of transfer case, front axle actuator due to damage from oil on the rubber diaphram, flushed transmissi...
2002 Chevrolet Trailblazer LS 4.2L MIL Lamp on VIN: 1GNDT13S52
Hello all. Well i replaced the exhaust cam sprocket (cam actuator) and this has solved the problem. Thanks everyone for your input. Trouble codes: P0014.
2004 Chevrolet Silverado 3500 6.6L codes VIN: 1GCJC33264
Thanks for your help.I installed a new APP Sensor and so far so good. The voltage readings on the old sensor were within range but some wre near the limit and I know they can have an intermittent drop out. So considering the mileage and the rough use this truc... Trouble codes: P2122 (app sensor 1 circuit low), P2138 (app sensor 1-2 correlation), P2139 (app sensor 1-3 correlation).
2004 Chevrolet Trailblazer LS 4.2L Mode Actuator Motor VIN: 1GNDS13S34
Well, I had to punt on this one. We refered them to the Chevrolet dealer. They charged her 689.00 to replace a coil pack, one plug and reflash the computers. SHe drove it two days and it started all over again. Interestingly enough last week I had a 2004 G...
2008 Chevrolet Cobalt LS 2.2L Steering wheel VIN: 1G1AL58F28
Hello To All I went ahead and replaced the locking assy.after talking it over with owner.Thanks to all who replied. Jim
2008 Chevrolet Uplander 3.9L abs/traction VIN: 1GNDV23W48
Thanks to all who replied. Took awhile to get the part to fix it. We could only see one pressure sensor reading with the tech 2. Both sensor are internal to the hydraulic unit. We replaced the hydraulic unit and flushed the brake system, that corrected issue.
1997 GMC K1500 Sierra SL 5.7L No Start, Stall VIN: R6V1557000
Thanks guys , alot of great direction.Ken [...] hit it on the head in that "keep looking".with that said found further up the harness directly above drivers valve cover ABOVE exhaust cross over tube a questionable area like an eraser head.Opened harness and...
2002 GMC Savana 3500 5.7L No Start VIN: 1GTHG39R32
I was happy to see the tail end of this van leaving our shop. The problem was weird in that there was two problems. Not all injectors were firing and an ECM was required. We re checked this condition after the second problem was solved by re- installing the ol... Trouble codes: P1336, 91638 (testing and results).
2005 GMC Savana 1500 5.3L stoping distancee VIN: 1GDFH15T65
Thank you for all of you replies. The fix for this one was just many stops from 45 to zero time after time about 20 stops. The brake pedal got better with every stop. sorry it took so long to close this but we were waiting for customer to let us know how it wa...
1996 Pontiac Grand Am SE 2.4L Theft system VIN: 1G2NE52T2T
Grand am is fixed! I questioned the reman cluster from the day I put it in. To confirm it here is what was checked. First was to make sure the ignition switch was good. Check the black wire at the switch for 12v key on, then it should go to 0v in crank positio...
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