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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for September 2, 2011
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Open Help Requests for GM
Help Request Answers
1995 Buick Regal 3.8L No Start, long crank VIN: 2G4WB52L2S
This car has an intermirrent long crank/no start, mostly when hot. It can be running fine, then you can shut it off and immediately crank it and it will not start for 5 - 30 seconds. Then it will start to catch and finally start. Spark is present and very ho...
1998 Chevrolet Cavalier 2.2L Misfire VIN: 3G1JC1242W
I need help with a cavalier that has a very intermittent misfire or fishbite. No misfires counting on solus. while taking movie of the event the car runs a steady 11+ms for the injector pulse,at about 2500rpm/25% throttle and a slight load ie going up a hill/ ...
1999 Chevrolet P30 5.7L Hesitation VIN: 1GBH32R1X3
Need all the help i can get the problem is it is not all the time when it dose it add less last for 15mins some times or 10mins Trouble codes: P0719 (Brake switch low input), P0507 (Idle control system-high rpm)
2000 Chevrolet Cavalier 2.2L Steering Pump
I don't have a pressure gauge or a flow tester for this system. When starting the vehicle there is no noise from the power steering. Also, the fluid is full and looks foamy. I flushed out the fluid because I didn't know what was in it and put in fresh fluid. I...
2001 Chevrolet Impala 3.8L Cuts out VIN: 2G1WH55K11
hey to all chevy gurus - got this impala that has backfired through the intake, melted both the intake air temp sensor & the air mass sensor. seems that there was a big firs ball that traveled through the intake to the air filter because the air filter is burn...
2002 Chevrolet Silverado 2500 HD 6.6L No Start VIN: 1GCHK29192
This Duramax was having a long crank to start for a while. It came in as a no start. I found a rotted fuel line and repaired thinking it was sucking air into the fuel line and not starting. After repair it still would not start. If you squirt some type of fuel...
2003 Chevrolet Silverado 2500 HD 6.0L MIL Lamp on VIN: 1GCHC24U73
someone has changed pigtails at both tp snsrs we tried changing both snsrs and module Trouble codes: P0120, P2135 (tp snsr 1-2 correlation), P0332
1999 GMC Jimmy SL 4.3L trans. shift VIN: 1GKDT13W9X
Vehicle came in with a toasted trans., couldn't get a good test drive because of slipping from the start. Did notice that Trans. would skip 2nd gear., as stated earlier fluid was really bad. OK installed Jasper Reman. unit still skipping 2nd gear and really do...
2004 GMC Sierra 2500 HD 6.6L Poor Idle Quality, Misfire VIN: 1GTHK23264
Truck makes loud knocking noise and puffs thick black smoke. Sounds like detonation knock. Used modis to manually shut down injectors found that when injector number 2 was disabled the knocking stopped and the smoking stopped. Checked wiring at FICM and a inje... Trouble codes: P1223, P1226, P1229, P1232, P1235, P1241
2004 Oldsmobile Alero GL 2.2L No Start VIN: 1G3NL52FX4
i have this olds here that i put the electrical part of the ignition switch in and now it will not start. im thinking security system but it will not flash the security light. it has no fuel pressure and no injector pulse. can anyone help me
1991 Pontiac Sunbird SE 3.1L No Start VIN: IG2JB34T6M
car sat for 1 year ,filled tank with freash fule drove car 1/2 tank and it stipped running. Fule filter bwas clogged. Replaced and would not run , no injector pulse , replaced injectors and had 47 lbs at rail. Have 12.7 volts at injectors and the pulse. Car wa...
2001 Pontiac Aztek 3.4L Rear Hatch Release VIN: 3G7DA03E41
Customer googled problem, and found out that pulling the #28 fuse(bcme), and reinstalling would allow release to operate normally for one cycle of the key. The fuse would have to be removed, and reinstalled again to make the release work for one key cycle.

Fixes & Summaries for GM
Fix/Summary Answers
1994 Buick LeSabre Custom 3.8L Misfire VIN: 1G4HP52L9R
Hello Gentlemen, many thanks to all who helped me with this one, I disconnected the cruise control diphragm unit as this has a sensor inside that tells the ECU what position its in OK, well with the CC out of the loop so to speak the car runs perfect, the cust... Trouble codes: P1361, P1568, P1599.
1991 Chevrolet Corvette 5.7L No Start VIN: 1G1YY2388M
Vehicle fixed, The drain hole next to gas gap got plugged and alowed water to enter fuel tank. Contaminated fuel was the answer, I looked past the easy solution thinking it was good because the customer told me it was running one day and not the other. thanx i...
1995 Chevrolet K2500 Silverado 7.4L ABS Light VIN: 1GCGK29N5S
Cleaned wheel speed sensor,still no 350ACmv replaced hub bearing with new speed sensor, fixed issue. Thanks
1998 Chevrolet C2500 Cheyenne 5.7L No Start, VIN: 1GCGK29R5W
Many of the replies, suggested to let vehicle go, problem with ECM ignition fuse blowing. I let the vehicle go with a few minor changes. I decided if the vehicle was released, to give the customer some reassurance.I replaced the fuse with a non-cycling circui...
1999 Chevrolet Tahoe 5.7L Hesitation VIN: 1GNEK13ROX
Well as stated in request fuel pump was replaced and no change, ended up removing spring from fuel cap vent valve and problem disappeared. Cust completed several hundred mile vacation while towing his camp trailer and no symptoms and even stranger, no ses la... Trouble codes: P0131, P0137, P0151, P0157.
2002 Chevrolet Trailblazer EXT LT 4.2L MIL Lamp on VIN: 1GNDT13SX2
I have replaced the "solid state" relay. The customer has reported it is fixed. Scott and Germano hit it right on the head. Other replies said to replace fan clutch, update PCM, and check for chaffed wires. Thank you all for the help. Trouble codes: P1482.
2006 Chevrolet Silverado 1500 LS 4.3L Cuts out VIN: 1GTEC19X76
Welp this one is fixed. After testing coil, ICM, Crank and cam sensor and replacing with test parts I got the same thing. Then vehicle finally decided to not start at all. Test powers and grounds. Was adout throw in the towel. Was checking for pulse at coil fr... Trouble codes: P0449.
2009 Chevrolet Malibu LT 2.4L No Start VIN: 1G12H57B09
sent to dealer they installed a new ecm and all is well no charge.i dont know what happend when baterry terminal was cleaned Trouble codes: U0100, U2105.
2003 GMC Safari 4.3L brake light fuse, no high mouth brake light VIN: 1GKDM19X43
it's fixed...thanks to all the techs who took time out of there day to help, most replies said that the white wire at the brake light switch was for the high mount brake light, one said that it also went to the trailer harness, oohhhhhh???,and since the high m...
2006 GMC Yukon XL 1500 SLE 5.3L No Start VIN: 3GKFK16Z46
wel i can no longer say it's not the computer on gm obd2. replaced and program new computer and all is well. other than early 6.5 diesels i have never had to replace a gm computer with obd2. wish i could say the same for ford and chrysler. thanks to all who to...
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