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Prev Professional Automotive Repair Technical Discussions for October 15, 2010
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Open Help Requests for GM
Help Request Answers
2004 Buick Rendezvous CX 3.4L Hesitation VIN: 3G5DB03E34
hi, and thanks, car came in and has bad flat spot, i noticed if you keep tps under 2 volts runs fine, over 2 volts (30%) feels like exhaust pluged and holds back the whole time you are over 2v. check air intake and fuel presure good. evan change maf sensor, un...
2003 Cadillac Escalade ESV 6.0L Compressor VIN: 1GYEK63N13
Car came in due to compressor noise and we replaced compressor, condensor, reciever dryer, orifice tube. After repair a/c clutch will not ingage. Checked fuses, relay and power to relay and all is working. I have a weird irratic gound control from pcm. If i su...
2004 Cadillac CTS 3.6L Ebcm VIN: 1G6DM577X4
Car was towed in with complaint of not being able to move shifter from park position. Upon arrival we also noted the ABS TCS off & Brake warning lamps were illuminated on the dash. Class 2 DTC check showed the following codes SIR: U1000, U1040 IPC: U1000 ECM P...
1999 Chevrolet Tahoe 5.7L MIL Lamp on VIN: 1GNEK13R6X
We intalled a reman engine. New ignition wires, spark plugs, ignition cap,and ignition rotor. All other electrical parts and sensors were tranfered from old engine. We keep getting code 1345. We installed distributor acording to Alldata and Mitchell which are ... Trouble codes: P1345 (camshaft to crankshaft position correlation fault.)
2003 Chevrolet Silverado 2500 HD 6.6L Extended crank VIN: 1GCHK23113
Truck came in with an extended crank / no start at times. Had to prime to get running.Has no codes.Check vacuum @ service port. Only had 2" of vacuum. Bypassed filter assembly, and ran truck off remote fuel source. Same result. Replaced fuel pump. Has good vac...
2003 Chevrolet Silverado 1500 LT 5.3L MIL Lamp on VIN: 2GCEK19T33
Engine light on intermittantly. Today we tested and system was not holding pressure but during test, it started holding pressure, but we did not change anything. Changed evap valve as per TSB twice now (thought might have been sticking). Light came back on. ... Trouble codes: P0422 (Evap leak small), P0463 (Fuel level sensor)
2003 Chevrolet Trailblazer LT 4.2L MIL Lamp on VIN: 1GNET16S13
this vehicle failed emissions came in with p0105 on that was the only code in pcm. there are no drivability compaints. I have replaced the map sensor and it set the code right away on the next key cycle. With koeo and map pulled out of intake the voltage is at... Trouble codes: P105
2005 Chevrolet Silverado 2500 HD 6.0L Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GCH1629VX
Hello techs, I have a problem that I'm pulling my hair out and could use your help with. This chevy pick up misfires intermittently on cylinders 2,4, and 8. When looking at misfire graph with the tech 2 it mostly misfires on 8 and 4 most of the time intermitte... Trouble codes: P0300
1995 GMC C1500 Sierra SLT 5.7L Poor Idle Quality, Surge VIN: 2GTEC19K0S
Ok here we go folks thanks in advance really need the TBI gurus helping here. After all tune-up work performed noticed the engine would cut out at idle intermittently So I test drove it and my highway cut out is gone. Now I have rough idle intermittently. PCM ...
1996 GMC Safari SL 4.3L Misfire, MIL Lamp on
Thanks for any replies in advance. I have this GMC Safari thats killing me. At idle this van will show misfires counting on cylinder #5 sometimes. When the rpm hits about 1800 cylinder 5 stops misfiring then all other cylinders start missing. Checked fuel pres... Trouble codes: P0300 (Random cylinder misfire)
2000 GMC Sierra 1500 SLT 5.3L Misfire VIN: 1GTEK19T1Y
Can in with engine light on (was flashing previously but not now). Road tested and light misfire under load at 2500+ rpm's. Fault code p0300 and misfires on #5 and #8 cylinders but only at 2500 rpm or more. Truck runs fine. good power, highway drive is fine, ... Trouble codes: P0300 (Random misfire)
2002 Pontiac Grand Am GT 3.4L No Start VIN: 1G2NF52E63
Man i hope you all can help me on this one. story goes like this. last year in april we did a head gasket job on this car everything went normal on it. 4 months later car get towed into the shop as a no start. we went out there it fired right up with no ses li... Trouble codes: P0336 (testing and results)
2008 Saturn Outlook XE 3.6L Cuts out, Stall
Hello all.Hope all is well in the great world of auto repair. I have a 2008 Saturn Outlook in the shop. while driving it cuts surging or missfire while driving just cuts out like someone hit the light switch.It will not turn over when this happens.Gets ...

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick LeSabre Limited 3.8L engine VIN: 1G4HR52L6S
2004 Buick Park Avenue Ultra 3.8L 2-1 coast down shift VIN: 1G4CU54164
Customer elected to have transmission removed and disassembled. The inner lip seal on the input clutch was in very poor shape. Thanks to all for your input and help]
2005 Cadillac CTS 3.6L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G60P567X5
Checked engine oil as you requested found it 2 quarts low and black. replaced engine oil pressuer sensor and changed oil car runs great thanks. Trouble codes: P0206 (Injector circuit problem), P0306 (Misfire 6), P0443, P0521 (Engin oil press sensor performance), P0523 (Engin oil pressuer sensor circuit signal low).
2005 Cadillac Escalade ESV 6.0L ride control VIN: 3GYFK66N35
I checked the basics like, "Roger from Florida" suggested and found all power and grounds were good. We did find that the connectors for the electronic suspension control module had sand in them. I assume water had got in there too but it hasn't hardly raine...
1991 Chevrolet Caprice Classic 5.0L Stall VIN: 1G1BN53E3M
I haven't been able to get this vehicle back, due to the vehicle owner's family is short on vehicles & this one can be driven & only stalls when put in gear. I am willing to bet that the distributor is the poblem though. I thank you guys for your help & am goi...
2005 Chevrolet Uplander 3.5L charging system only works part of the time VIN: 1GNDX33L55
After I had put the alternator on I thought it still was not charging right but after the replies I received I figured out it was normal. I had never seen voltage run so low before. With the other alternator it would stop charging all together and start runnin...
2006 Chevrolet HHR LS 2.2L Abs,Air Bag, VIN: 3GNDA13D36
The HHR is not fixed due to a Tech 2 not being in the shop owners budget. I'd like to thank Alex, Mike and Alan for their help. Alan stated to disconnect modules one at a time. Since it is the same for German cars I had done this with no luck. I type to slow t...
2001 GMC Sonoma SLS 4.3L Won't shif out of 1st VIN: 1GTDT19W21
Thanks everyone for the help. After trying everything suggested and everything I listed two and three times, I started over again. I found the problem and corrected it. The wiring harness I mentioned I had purchased from the GM dealer - Well, whoever assemb...
2000 Pontiac Grand Am SE 2.4L MIL Lamp on VIN: 1G2NF52T5Y
Well i am gonna consider this one a fix. While having car in shop, removed gas fill tube, and with gas cap on it, hooked smoke machine up on the tube. Got smoke out up close to gas cap. Tried different cap with same results. Looking at it closer with it being ... Trouble codes: P0442 (Evap small leak detected).
2004 Pontiac Grand Prix GT1 3.8L MIL Lamp on VIN: 2G2WP52284
Thanks for all the replies. The wiring data was exactly what I was looking for. The purge flow problem wasnt a big deal. I pulled that out of the manifold and it had smoke pouring out. It was stuck wide open. But I was still concerned about that vent control n... Trouble codes: P496.
2000 Saturn LS2 3.0L Poor Idle Quality, Hesitation, Stall, Misfire, MIL Lamp on VIN: 1G8JW52R5Y
i would like to thank everyone that replied, in the end Russ nailed it with the ecm. we had another ls2 in the yard so i swapped out the processors to see what would happen and the reduced power light went out and i started to get throttle response. of course ... Trouble codes: P0300 (Random miss).
2003 Saturn Vue 2.2L MIL Lamp on VIN: 5GZCZ43D53
After several days, the customer has reported to me that the MIL has gone out and has not come back on again. In addition, he is trading the vehicle in on a newer one. I guess we will never know what happened. Sorry I can't provide more useful info at this ... Trouble codes: P0480 (Cooling fan 1 control circuit).
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