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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for June 4, 2012
International Automotive Technicians' Network (iATN) - Members Only
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Open Help Requests for GM
Help Request Answers
1999 Chevrolet Express 1500 LS 5.0L MIL Lamp on VIN: 1GBFG15M6X
Hi could really use some assistance from you gm techs, This car came in with the two codes p340 p1336. I scoped the cam sensor and found that it had no signal i cheked for voltage coming in (12v). Decided the sensor was bad and replaced the whole distributor. ... Trouble codes: P0340, P1336
2001 Chevrolet Silverado 1500 5.3L security VIN: 2GCEK19T41
vehicle came in no start. ck codes found code b2961 key in ign fault. replaced ign switch and lock cyl. performed relearn, vehicle runs now but has security light on steady with engine running and code b3031 security system controller in learn mode.code will n...
2004 Chevrolet Aveo LS 1.6L Timing Belt/Water Pump VIN: KL1TJ52614
Vehicle was towed back in over the weekend, the water pump failed again, the shaft is cocked sideways, belt came off and chewed through the timing cover. Each replacement lasted about 8900 miles. Has anyone seen this before, or does anyone have knowledge of th...
2004 Chevrolet Trailblazer LS 4.2L low beam headlights VIN: 1GNDT13S64
Good afternoon everyone, The low beam headlights on this Trailblazer do not come on, we checked the schematics Alldata provided, tried commanding the lights on with our Solus, the data stream reads 100% when commanded, but, no low beams. If we send power thru...
2003 GMC Sierra 2500 HD SLE 6.6L tempurature gauge says 240 degrees VIN: 1GTHK23193
First off let me say that this is my truck and that I am by no means a diesel tech. What I have going on here is that my truck is "overheating" according to the guage and my scanner. The temp gets to 240* after about 10 minutes of driving. Seems to get worse ...
2005 GMC Sierra 1500 WT 4.8L mil VIN: 2GTEK19V05
p0449 is the DTC, replaced the vent solenoid, very common failure on these vehicles, replace with updated one, started truck back up light came back on, so checked the dtc and it was p0449 again, checked ground and power back, have power on orange wire to the ...
2005 Hummer H2 6.0L Misfire, MIL Lamp on
ok,this will sound weird but i have a strange misfire issue here.between 2000 and 3000 rpm in park or while driving # 1 and #6 will show misfiring as if the plug wires were off. both follow eachother like a mirror image.there is no actual misfiring that can be... Trouble codes: P0300
1961 Pontiac Star Chief 6.4L Hesitation
This car runs great, has a hesitation upon acceleration. I did notice, and suspect, that the intake gaskets were leaking, and they are. upon removal of the intake and during the cleaning process, I noticed that ther are low spots between the intake ports on th...
2003 Pontiac Grand Prix SE 3.1L MIL Lamp on VIN: 1G2WK52J73
This car came in with a P0341 (CMP sensor circuit). The customer just had the engine "rebuilt" (I don't know exactly what was done) somewhere else, and the car set this code and had an off idle hesitation. Before bringing it in, they replaced the cam sensor an...

Fixes & Summaries for GM
Fix/Summary Answers
1994 Buick Park Avenue 3.8L No Start, no injector pulse VIN: 1G4CW52L4R
hello-i have fixed this machine. the harness down to the CKP had 4 bare wires touching each other in some short circuit form or another. what these wires did was short out my good tester ICM as i was testing and make me experience the same symptom over and ove... Trouble codes: P1361 (Ignition Control Toggle Malfunction), P0321 (Spark Lost----History Code), P1629 ([...] Crank Malfunction).
1990 Chevrolet Camaro Iroc-Z 5.7L No Start, no injector pulse
As per IATN, I need to close this request with a summary. I will update a fix once truck is running. Everyone contributed greatly to my issue, and I thank you very much for your time. I have sent the PROM/MEMCAL out to Tune Port Programing Services that will c...
1998 Chevrolet Prizm 1.8L engine VIN: 1Y1SK5280W
Checked grounds & voltage at fuse box, and remove the ignition to check input voltage & outputs voltage. But did not find anything bad. Something I did find interesting is if you put on the flashers. The starter will engage with the beat of the flashers (on an...
2002 Chevrolet Impala LS 3.8L Starting VIN: 2G1WH55K02
Thanks for all the replies.Due to the fact that draw was changing from circiut to circiut I decided to go with bcm.replaced and programmed and car is fixed!!!
2007 Chevrolet Silverado 2500 HD Classic LT 6.6L No Start
Ok the truck is up and running. Sorry about the quick post Friday, it was right after work and heading for home when it broke. I have not had to work on one of these until now and was unfamilar with the system. That being said: It was the fuel filter, I remove...
2008 GMC Yukon SLT 5.3L Hesitation VIN: 1GKFK13018
New fuel pump fixed all problems. Thanks so much to everyone who responded with help. It is always greatly appreciated. Thanks again, Mike.
2003 Saturn Vue 2.2L Mechanical VIN: 5GZCZ33D43
Thank you for all the replies on this vehicle. I should have gone with my first instinct which was a torque converter seal. However, fluid was literally just pouring out of this thing so I was having a hard time believing that was what the problem was. Howev...
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