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Prev Professional Automotive Repair Technical Discussions for March 24, 2011
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Open Help Requests for GM
Help Request Answers
2002 Buick LeSabre Custom 3.8L No Start, Stall VIN: 1G4HP54K22
Good evening to all I have this buick here that starts right up runs for maybe 2 seconds and quits.I spray starting fluid into the throttle body and car will run as long as you are spraying starting fluid,quit spraying car quits.I replaced fuel pump and relay ... Trouble codes: P0101
1986 Cadillac Seville 4.1L Poor Idle Quality VIN: 1G6KS6984G
has new battery, customer stated now engine idles fast after driving 8 minutes. confirmed idle at 2300 after driving. read posts on sail on problem common. scanned computer, found codes 14 and 59. have been focused on -40 coolant temperature reading and 258 de... Trouble codes: 14 (Coolant temp sensor), 59 (Vcc temp sensor circuit problem)
1987 Chevrolet LLV 2.5L hazard flasher VIN: 1GBBS10EXH
Hi I was hoping someone out there may have some info on the 4 way flasher/strobe lamps on this 87 Chevy LLV.(post office vehicle)I have no schematic to look at on this vehicle,and have had no luck locating any info on how this system works.The regular directi...
1995 Chevrolet S10 4.3L 1-2, 2-3, 3-4, shifts VIN: 1GCCS14Z3R
hello everyone, I have a customers truck in that all of the sudden developed what he described as a hesitation or stutter. After a test drive I realized it was a trans shifting issue. It is a 1995 S-10 with 54,xxx miles on it. Very clean and well maintained. T...
1996 Chevrolet C1500 5.7L Poor Idle Quality, Stall VIN: 2GCEC19R0T
truck came to me from gm dealer,afterthe customer took it there for this problem,she complained of in the morning when backing out it would stall,seems intermit as i can't make it happen every time but often enough.i have ck-fuel psi,spark,cleaned mass air,smo...
1997 Chevrolet K1500 Suburban 5.7L abs VIN: 1GNFK16R8V
Hey all...Hope you can help with this one. When customer first came his complaint was left rear wheel lock up. We could verify that pretty easy. When you apply moderate pedal pressure the left rear will lock. I could not get any data from abs module. We instal...
2003 Chevrolet Silverado 2500 HD LS 6.6L transmission VIN: 1GCHK29173
I have 2003 2500HD in shop with codes listed. It doesn't shift out of first gear in any range and sometimes comes out of gear into a false nuetral. Brake light and ABS light on, instrument reads "service brake system" and "transmission range inhibited". On upp...
2005 Chevrolet Corvette 6.0L Harmonic Balancer VIN: 1G1YY34U65
I'm wondering what all is involved with the replacement of the harmonic balancer. This car has the symptoms of TSB#05-06-01-001D. My question is, do you really need to use the special tool to remove the front mono-leaf? And what about removing the harmonic bal...
2005 Chevrolet Avalanche 1500 LS 5.3L transfercase VIN: 3GNEK12Z15
Hi all, I hope I can get some help and direction on this. including testing advice. sorry for long story but I feel it's needed. Customer's complaint was, It intermittently went into 4wd. (this has 4wd and auto) not sure which one he ment. and also the service...
2006 Chevrolet Trailblazer LS 4.2L abs VIN: 1GNDT13S56
Vehicle came in for ABS and Red Brake warning lights on. Cannot communicate w/ABS using Genysis. I have power and ground @ appropriate connectors. High voltage drop on ground circuit. Repaired corroded ground @ LH frame rail and battery to body ground. Still n...
2009 Chevrolet Suburban 1500 LT 5.3L Trailer Brake Wiring VIN: 379J116294
According to TSB#07-08-45-001F : The harness, with blunt wire ends, to connect an aftermarket Trailer Brake Controller should be looped and taped to the main harness near the Data Link Connector. There is a very good picture of the location on the TSB. I have ...
2003 GMC Yukon SLT 5.3L Front Crash Sensor 1 VIN: 1GKEK13ZX3
We have a good one here. Vehicle came in with a B0100 Electronic Front End Sensor 1 Performance. I have checked affected wires (grey and yellow) at sensor and at SDM. Ohmed out the wires with 4 to 5 ohms of resistance. Check crash sensor for resistance against...
2003 GMC Envoy XL SLT 4.2L MIL Lamp on, No Acceleration VIN: 1GKET16S23
Customer called a few days back, said engine was not running right, engine miss. Vehicle was towed in with no throttle response (no acceleration at all). I found #2 coil shorted to ground. Now there is no engine miss, but the 1512 code will not reset, and if u... Trouble codes: P1512, P1515
2005 GMC Sierra 2500 HD SLT 6.6L Poor Idle Quality, Misfire, MIL Lamp on, no power VIN: 1GTHK23275
I have very limited diesel experience but i know this is a common problem with this engine. I have heard there is a two wire connector somewhere that is the most common problem. Again, i have very limited experience so any details as to location of components ... Trouble codes: P0202 (Cylinder - injector circuit problem), P2149 (Injector position voltage control circuit group2)
1998 Pontiac Trans Sport Montana 3.4L Excessive Emissions, Poor Idle Quality, Stall, Misfire, MIL Lamp on
ok guys, please help!! car came in shop with coolant leak. dye test...head gasket. change head gaskets and start up. sounds like timing belt broke when turning over. found pushrods bent. the short ones??? if it was the long ones i would say installed wrong, bu... Trouble codes: P0300
2004 Pontiac Grand Prix GTP 3.8L Cluster/ Info Center VIN: 2G2WR52404
Right after starting, info center display's multiple warning's. ABS, anti-lock,variable rate power steering,service brake system,low fuel/fuelgage erratic. Checked for code's.None at this time.
2006 Pontiac G6 3.5L shift interlock VIN: 1G2ZG558X6
Car will go for three days with no problem, then he come out from work to leave it won't come out of park. After 5 - 10 minutes of trying it will work ok for 3-5 days, then happens again. I have replaced the brake light switch 2x, the brake pedal position sens...
2007 Pontiac Grand Prix 3.8L No Start VIN: 2G2WP58277
Car came in on hook, checked the normal- fuel pressure, spark, inj. pulse. Checked wave form and power and grounds to crank and ign. control module. No inj. pulse, good wave form from crank sensor. Has good spark and fuel pressure just lacking inj. pulse. On m...
1992 Saturn SL1 1.9L Excessive Emissions, Poor Idle Quality, Poor Fuel Economy VIN: 1G8ZG5498N
can anyone tell me where coolant sensor A is or where it gets its reading from??? found coolant sensor B and gauge sensor on back of head. Suppose to be one by egr but its not. Have searched this whole motor and can't find this second sensor anywhere. PLEASE H...

Fixes & Summaries for GM
Fix/Summary Answers
2008 Cadillac SRX 3.6L 3rd row seat VIN: 1GYEE63728
Thanks again to all who replied.The fix or trick was to help the seat back just a little when it was going through the auto calibration.(let me explain ).There are 2 contact switches one for the folding cover and one for the seat back .When I removed the seat ...
2001 Chevrolet Silverado 2500 HD 8.1L Engine VIN: 1GCHK29G41
2008 Chevrolet Express 3500 6.0L Hydro boost VIN: 1GBJG31K38
2003 Saturn L300 3.0L Surge, Cuts out, Misfire VIN: 1G8JW54R33
This was definitely a seat of your pants fix. No one really wanted to tackle the Cam/Crank timing relation head on, due to the fact that this is a PO@#@~ Saab. I don't think anyone really knows. I was working with the fact that the Crank sensor amplitude was l...
2007 Saturn Aura XE 3.5L brake switch VIN: 1G8ZS57N17
recalibration of brake pedal position sensor corrected this problem.
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