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Prev Professional Automotive Repair Technical Discussions for February 25, 2007
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Open Help Requests for GM
Help Request Answers
2000 Cadillac Catera 3.0L Misfire, MIL Lamp on VIN: W06VR548YR
Cadillac Catera experts please help!First time customer brought vehicle in with CEL light on complaint.When I pulled vehicle in the service bay CEL light was flashing-retrieved codes P0300-P0301-P0303-P0305.Engine felt like had a misfire although not like all ... Trouble codes: P0300 (random cyl misfire), P0301 (cyl 1 misfire), P0303 (cyl 3 misfire), P0305 (cyl 5 misfire)
2000 Chevrolet Blazer LS 4.3L Door locks, Power Seats, Interior Lights VIN: 1GNDT13WXY
Hi Techs, I'm having a problem with my own personnal vehicle. The other night the OEM car alarm starting going off in my driveway. I walked out to find that the power door locks were operating randomly. The first thing I thought of was the electric start that...
2003 Chevrolet Silverado 1500 5.3L gas and battery VIN: 2GCEC19T93
Good morning all- Have one here giving some strange problems.This one was handed to me from another tech in the shop.Originally the truck came in for the battery guage was reading too high.The other tech checked and replaced alternator-test indicated 15.5 vol...
2004 Chevrolet Silverado 2500 6.0L inst. cluster VIN: 1GCHC24U14
truck came into shop with speedometer inop replaced instrument cluster sent old cluster to techni-car for replacement just got the replacement today i installed it now it displays needs programing customer need this truck monday at 11:oo am monday morning i am...
2004 Chevrolet Impala 3.8L dash panel direction control switch not working VIN: 2G1WF52E14
owner complains that blower for ac & heater only goes out defrost. checked actuator under dash , had no voltage coming from control switch . checked all fuses . removed actuator, moved part in dash with screwdriver ,everthing works ok. need information on cont...
1994 GMC K1500 Suburban SLE 5.7L Excessive Emissions, Poor Idle Quality, Misfire, Poor Fuel Economy VIN: 1GKFK16K9R
Hello all Techs! I've been scratching my head on this one for awhile. Good client brought this Suburban in after having it in several shops in the area. It has had a ton of parts thrown at it from various shops, with no improvement. From cold start, it will ru...

Fixes & Summaries for GM
Fix/Summary Answers
1996 Cadillac DeVille 4.6L No Start
Special thanks to Dave,George,and Juan on this one.Evidently the ipc has the vin programmed in and using a boneyard ipc even if it is programmed sps style for the anti-theft system will not work because of the mismatching vin's between the ipc,pcm,and bcm.When... Trouble codes: 1632 (Theft Deterrent Fuel Disable).
1997 Chevrolet Cavalier 2.2L Hesitation, Cuts out, MIL Lamp on VIN: 1G1JC1248V
So thanx for all the help! I ende up finding out that the car had been in an accident a couple of years before. It was a front end collition. The ecm is located in the RF bumper/fender area, so i tore it all out and foun some wires that had been damaged and we... Trouble codes: P0502, P0335, P0341.
1998 Chevrolet S10 LS 2.2L MIL Lamp on VIN: 1GCCS1941W
Thanks For The Replies. I Did Check Fuel Pressure,Map,O2,Power & Grounds. I Really Believe It Has A Bad ECM.Customers Request Not To Repair. Will Be Trading It In. Thanks Again. Trouble codes: P0172.
1999 Chevrolet K1500 Suburban 5.7L MIL Lamp on VIN: 3GNFK16RXX
Well id like to thank you all for the replys. We checked and double checked the grounds to all the o2 sensors. All checked good. I also checked the main ground that is at the right front of the block. Nothing found all grounds checked good. We replaced the ups... Trouble codes: P0141, P0430.
2001 Chevrolet Silverado 1500 5.3L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 2GCEK19TX1
Sorry every one I do not have a for sure fix I looked at it for 3 hr more and came to the conclusion that the low compression in 4 and 5 have to be the ansure 25 psi I have checked every thing I could come up with I did forget to say that I did check the press... Trouble codes: P0300.
2002 Chevrolet Cavalier LS Sport 2.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G1JH52F72
Thank you guys for all the advice.I checked fuel pressure regulator and cleaned throttle body.My fuel trim numbers indicated that the fuel mixture was ok.I went ahead and added propane and car still ran the same.Vacuum gauge revealed that the vacuum was a litt... Trouble codes: P0300.
2004 Pontiac Grand Am SE1 3.4L MIL Lamp on VIN: 1G2NF52E94
i appreciate everyones response to my help request. the customer cancelled their appointment to return for further diagnosis.they needed their vehicle back the same day i submitted my help request and said they would reschedule.they said they would try to get ... Trouble codes: P0401.
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