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Prev Professional Automotive Repair Technical Discussions for December 23, 2008
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Open Help Requests for GM
Help Request Answers
2000 Buick Regal GS 3.8L radiator fans VIN: 2G4WF5514Y
Hi, Folks looking for some additional info here. This car came in with radiator fans always on when the engine is running. You turn the ignition off and the fans turn off. Looking at my scanner (Genisys), I see the PCM to command the fans on, low and high spe...
2002 Buick LeSabre Custom 3.8L Blower Motor
Hi everyone, Thanks in advance for reading this request. Subject vehicle has a failed Blower Motor. No problem, right? Wrong! Replacement Blower from ACDelco and from Buick factory store will not mount to car. Bolt pattern and mounting are different. Footno...
1997 Cadillac DeVille d'Elegance 4.6L Starting VIN: 1G6KE54Y0V
p0606 fault vehicle will not program pcm.pcm has been replaced.serial data line is not shorted to grd or battery.power and grds are good to module.visual inbspection of wiring under seat and hood compartment ok.also we cannot program theft
2003 Cadillac Escalade 6.0L reduces to idle VIN: 1GYEK63N73
Vehicle intermintently drops to idle while driving, trac control disables. After several minutes, resets and drive fine for 10-50 Miles. Wiring to TPS and APP sensors undamaged. Have yet to reproduce condition, no codes found, another repair shop said multiple...
2002 Chevrolet Trailblazer LS 4.2L MIL Lamp on VIN: 1GNDS13S82
well ho ho ho santa is not being good to me on this one came in with a p0014 cam phase problem oil was coming out of the end of the sensor so we replaced the sensor and put a new pigtail on it also and check for oil in wires. sent it out and it came back same ... Trouble codes: P0014 (cam phase sensor)
2002 Chevrolet Monte Carlo SS 3.8L ignition switch VIN: 2G1WX15K92
I have reset the pass key using instructions from locksmith where I purchased the lock. when I turn the key to start nothing. I also installed new battery. Please help! what should I do now?
2002 Chevrolet Silverado 1500 5.3L trans VIN: 1GCEK19T22
see related repair history sorry its been a long day!
2004 Chevrolet Silverado 1500 5.3L Misfire VIN: 1GCEK19T64
Customer complaining that around 1500 RPM going around 40-50MPH in 4th gear truck starts to misfire. Confrimed customers complaint, Road test with TECH2 mointoring mis-fires, does not show any misfires and MIL light is off. It feel just like a mise-fire though...
1989 GMC R2500 Suburban 5.7L Won't shut off VIN: 1GKGR26KF8
This Suburban will not shut off. When we turn the key off, the voltage signal to the ECM pin A6 drops from 14.6v to 9.5v. With the key on, engine off, the voltage to A6 is zero. We are also getting a slight electrical burning smell under the steering column bu...
1996 GMC G3500 Vandura 5.7L Hesitation VIN: 1GDEG25K9S
Road test.Misfiring all the time.Replaced Plugs,Wires,Cap,Rotor and Fuel filter.Runs better but still seems to lack power.Check timing with timing connector disconnected.Zero degrees.Check backpressure on exhaust,No more than 2 PSI,Did notice while monitoring ...
1997 GMC Yukon SLE 5.7L Pinging / SparkKnock VIN: 1GKEK13R3V
Engine was pinging when presented, reasonably constant, suspected EGR problem... Note: MIL lamp was disabled (NOT HERE!) and is not functioning! 1)Checked for codes found; P1870 TCC slip & p0300... Scan data shows aprox.250-290 rpm tcc slip (high gear with ... Trouble codes: P1870, P0300 (Random Multiple misfires)
2000 GMC Jimmy Diamond Edition 4.3L No Start VIN: 1GKDT13W0Y
Vehicle came into shop for unrelated repair. Vehicle was running. Went to get in to vehicle to move it out and it stalled. Will crank and run for a second and then stalls. No DTC fuel proeeure is with in range KOEF 64 lbs. Almost seems like a anti theft issue?...
2003 GMC Yukon SLE 4.8L MIL Lamp on VIN: 1GKEK13V33
vehicle came in with hard system lean bank 1 and 2 codes, checked fuel pressure was 40psi, tried to adjust regulator would not change, replaced regulator and adjusted to 48 psi max, replaced fuel pump + filter and adjusted fuel pressure to 54psi. long term fue... Trouble codes: P0171, P0174
2003 GMC Yukon XL 1500 SLT 5.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 3GKFK16Z23
check engine runs rough Trouble codes: 300 (multiple misfire), 306 (misfire on 6 cyliner), 305 (multiple misfire)
2004 GMC Envoy XL SLT 4.2L rear air suspension VIN: 1GKET16S94
replaced bags installed fuse for system found had no power to inflator switch. Replaced corroded wires. pump will come and inflate bags but will not add enough pressure to set height. cant find any info on system really.
2004 Oldsmobile Alero GL 2.2L Starting System, Security? VIN: 1G3N154C14
Happy Holidays Gentlemen!, I guess I am praying to the GM gods out there. I have an OLDS Alero I can't seem to figure out yet. The vehicle was towed in after sitting for months. The customer said the vehicle just would not start one day and the key fobs would...
1994 Pontiac Grand Prix SE 3.4L Stall VIN: 1G2WJ52XXR
some one help this is a 3.4 dohc car starts and runs then shuts off like some one turned the key off most of the time it starts right back up and runs fine never more than 3 minuts .and some times it wont start at all and when it dont run it has no injector pu...
1997 Pontiac Bonneville SE 3.8L po1641
Hello Fellow Techs been a member and sponsor for several years but havent posted much but i belive in supporting this site. My problem Car came in with leaking fuel sending unit , replaced sender and pump. I try not to belive in the EVERY SENSE YOU comments c... Trouble codes: P1641

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick Riviera 3.8L No Start VIN: 1G4GD22K8S
I am going to call this one done as far as i can go. Kerry hit the nail on the head. I had several good replies, first i did find a bad starter. Then i still had no comms and i checked the pwr/gnds at pcm-ok, then pwr/gnds at cluster. Tried scanner with cluste...
1998 Chevrolet Metro 1.0L MIL Lamp on VIN: 2C1MR2269W
Well, I finally get to close this one. And thanks to all for the many replies. To the guys who figured a short in the wires between o2 and computer, good job. Two of those old wires shorted together and gave me a constant 1.25v no matter what I did. I... Trouble codes: P0420.
2002 Chevrolet Trailblazer LS 4.2L MIL Lamp on VIN: AGNDT13S12
Thanks for all the speedy replies from the group, it was the timing actuator solenoid as several of you suggested, when comparing the new sol. to old I noticed that new part had three black screens, old one only had two, one of you suggested that these may com... Trouble codes: P1345 (CKP/CMP correlation problem).
2003 Chevrolet Cavalier LS 2.2L Misfire, MIL Lamp on VIN: 1G1JF52F33
First of all thanks for replies they ranged from bad machining on the head to egr valves. This car came from a friends shop and after testing everything nothing made sense one person suggested that when we smoked the intake it might be leaking out the bottom a... Trouble codes: P0304.
2005 Chevrolet Silverado 3500 LS 6.6L Air in Cooling System VIN: 1GBJK34225
Well,the consensus is that it has blown head gaskets, or a friend said it could be the egr cooler. Since I could not absolutely prove it was head gaskets, I sent the customer on their way. A local GMC dealer told him it needed head gaskets. I think he is going...
2000 GMC Sonoma SL 4.3L drivetrain VIN: 1GTDT19W1Y
i received some good replies-i changed the rear differential fluid, there was no bearing material or gear teeth worn or broken-i used a temperature gun at each wheel and at the front and rear diffs-nothing was overheating-customer needed his truck for work and...
1993 Saturn SL1 1.9L Surge, Stall, STARTS AND DIES VIN: 1G8ZG5595P
Basic tests showed all sensors to be working correctly. Several replies led me to new tests (intake manifold leak, load tested alternator,several others.)thanks for all the replies. Unfortunately the customer chose not to go any further in testing and decided ...
1998 Saturn SL1 1.9L MIL Lamp on VIN: 1G8ZG5281W
Thanks for all your help after further testing i found thatb the ecm was commanding the egr on but not off causing it to stay open all the time Trouble codes: P0105, P0122, P0131, P0401, P0404, P0405.
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