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Prev Professional Automotive Repair Technical Discussions for December 27, 2010
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Open Help Requests for GM
Help Request Answers
2001 Buick Century Custom 3.1L Mechanical VIN: 2G4WY55J21
Engine like so many other 3.1 's has that famous lifter/cam noise, it does it when cold and now does it at idle when warm also. Mt wife's car also does it and we have seen tens of 3.1's with this noise. Gm has a bulletin out about piston slap??? Has anybody go...
2004 Buick Regal LS 3.8L shift interlock VIN: 2G4WB52K54
Car came in with customer complant of shifter wouldn't come out of park and no shift indicator. Also found no reverse lights,no radio, no comunication with scanner to pcm,bcm,abs,or icp. After testing power at all fuse, ignition switch and modules all good! I ...
2006 Cadillac SRX 3.6L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GYEE637X6
SUV came from another shop after they replaced the left timming chain(the previous chain broke down). They replaced the left secondary timming chain, all three tensioners and all 6 guides but the car was idling rough and check engine light on codes P009, P0018... Trouble codes: P0009 (Engine Position System Performance Bank 2), P0018 (Crankshaft Position CKP/Intake Camshaft Position CMP Correlation Bank 2), P0019 (Crankshaft Position CKP/Exhaust Camshaft Position CMP Correlation Bank 2), P0302 (Cylinder 2 Misfire Detected), P0304 (Cylinder 4 Misfire Detected), P0306 (Cylinder 6 Misfire Detected)
1997 Chevrolet K1500 Suburban 5.7L abs module VIN: 1GNFK16R0V
I have a 1997 Suburban 1500 that the Abs module is almost constantly running. Both front wheel bearings and speed sensors replaced. Rear sensor tests fine. All sensors read the same speed while driving. Abs light doesnt come on and no abs codes set. Any ideas ...
1998 Chevrolet K2500 Silverado 6.5L Mechanical
This vehicle is custom.Its actually an 85 K20 with a 6.5TD and a 4l80e trans with a Tci trans controller so there is no way to hook up diagnostic equipment. This transmission has one cooler line at the back. When vehicle is put into drive truck feels like it i...
2003 Chevrolet Silverado 1500 5.3L t-case VIN: 1GCEK19T73
replaced transfercase last week with a jasper and the new one had no 4wd high did have 4wd auto checked with the scanner and found no output speed test wires and found that the case was missing parts replaced with a new jasper and now have my output speed but ...
2005 GMC Yukon XL 2500 SLE 6.0L MIL Lamp on VIN: 3GKGK26U05
OK, right after Christmas and my hair is being pulled out. This vehicle has been here 4 times with this exact same code. The first time the coolant was low due to a leaking water pump. The next time we installed a new coolant temp sensor. Last time we replaced... Trouble codes: P0116 (ECT sensor performance)
2002 Pontiac Bonneville SE 3.8L charging gauge VIN: 1G2HX54K92
need your help on this one, car has had two new alternator, new battery when car came here, trouble is when you start car up for about 1 minute gauge in dash reads charging 14 volts then drops to zero and check gauge light comes on, but you put test meter at t...

Fixes & Summaries for GM
Fix/Summary Answers
1991 Cadillac Brougham 5.0L high idle VIN: 1G6DW54E6M
The problem with this vehicle was the timing had to be adjusted. I am sorry i took so long to close this request. Thank you for all the great advice.
1994 Chevrolet C1500 5.7L Hesitation, Surge, Stall VIN: 2GCEC19K3R
This truck is out of my shop. Pete from Wisconsin told me to disconnect the map...yes it ran great!checked map wires and vacuum line(new delco sensor) ...fine customer did not want to spend any more money on old work truck...lot of mileson the engine, the onl... Trouble codes: 33 (manifold absolutemap signal voltage high).
1996 Chevrolet C1500 5.7L Misfire, MIL Lamp on VIN: 2GCEC19R3T
this one is done, i liked the idea of blocking the pcv and vent and checking vacume on dip stick, wasent it, but ill use it in the future, it was the dist. cap as several people said, i was looking past it due to the fuel trims, but of course the missfire(s) w... Trouble codes: P0300.
1998 Chevrolet P30 7.4L Poor Idle Quality VIN: 1GBMP37B9W
thanks for all the responses. a couple of guys mentioned fuel volume test. recieved only 8 zo fuel in 15 seconds at idle. should have 16 oz. also found at half trottle fuel gauge would fluctuate alot but not at wot. I restricted the return line to 75 ... Trouble codes: P0131, P0151.
2002 Chevrolet Trailblazer LS 4.2L MIL Lamp on VIN: 1GNES16S22
2004 Chevrolet Cavalier LS 2.2L Poor Idle Quality VIN: 1G1JC52F24
1st off, Thanks to all that replied on this. This car, not 1 time acted up until yesterday morning ( Sunday) and this morning was fine.I had a suspicion about the IAC and had 1 here. I changed it this morning and the original 1 was sticking in the spring and s...
2007 Chevrolet Corvette 6.0L roof
thanks for the replies. we reclearcoated it and we'll just have to wait and see what the fl sun does to it.
2000 GMC Sierra 1500 SLE 5.3L Hesitation, Surge, Cuts out, Stall VIN: 2GTEK19T3Y
First thanks to all who replied to help. I really appreciate it when you guys get back so soon. I used my 24 hour pass to the full data base and found several MAF sensor posts with the same conditions I was having. Alex from Georgia had it right...but I did'...
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