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Prev Professional Automotive Repair Technical Discussions for November 16, 2009
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Open Help Requests for GM
Help Request Answers
2003 Buick LeSabre Custom 3.8L abs module VIN: 1G4HP52KX3
the customer said all he did was change the battery after the car had been sitting and aaa came out and jumped the car off. the car had been sitting for about a month or so. they told him the battery was no good and he changed it out and this is when the light...
1998 Chevrolet Blazer LS 4.3L 4wd VIN: 1GNDT13W2W
customer states 4wd slams out of 4x4 when disengaged. road tested 4x4 engages fine, but when disengaged it takes approx 2 block before it rolls itself out then bang shifts out of 4wd.checked for codes-none found, removed battery tray,disconnected cable at both...
1999 Chevrolet K1500 Suburban 5.7L no pull VIN: 1GNFK16R2X
trans rebuilt by my tech. workked fine for two weeks and started not pulling. No movement at all. Now I can let it sit for a hour or so and it will go in all gears and work fine. after i shift it back from reverce it make a small rattle sound and quit pulling....
1999 Chevrolet Astro 4.3L heating VIN: 1GNDM19W3X
This van has just barely enough heat to clear the windsheild off in cold weather, but not enough to actually heat the passenger area? Seems to act simlar to a T-Stat problem although I just put a new oem stat in it? Was able to test drive vehicle after creatin...
1999 Chevrolet Corvette 5.7L Dash illumination VIN: 1G1YY22G1X
Customer complaint is dash illumination lights do not work when automatic headlamps are on. If you manually turn on the parking lights or headlights the dash lights work. If you put the key in the ignition, and/or go to accessory, they are illuminated. But if ...
1999 Chevrolet Silverado 1500 5.3L Transfer Case VIN: 2GCEK19T7X
This truck showed up at my shop with a complaint of binding when turning in Auto 4wd. First thought was bad fluid. The fluid in the T.C. wasn't terrible but he wanted to make sure the clutches and drum were still good so I removed the T.C. and checked it over....
2004 Chevrolet Monte Carlo SS 3.8L Hesitation, Surge, Cuts out, Stall VIN: 2G1WX15K74
first off any help is greatly appreciated. I just inherited this car from our new "driveability tech", whos first recommendation was 3 new coils and an ignition module, he then tried a new tps and new iac to no avail. now I have the car. on test drive found th...
2004 Chevrolet Trailblazer LS 4.2L Cam shaft actuator VIN: 1GNDT13S24
There is a leaking intake valve on cylinder 1, My question is when you start disassembling it says to make sure exhaust cam shaft is fully advanced prior disassembly,reassembly, but there is no clear answer as to how you advance it. Can some one shed some ligh...
2004 Chevrolet Silverado 2500 LS 6.0L Starting VIN: 1GCHK29U14
OK I got this truck and customer says it is a intermitant no start, and that when it is going to act up that nothing on the dash works, so I tried it and thats excatly how it happens, key in, switch to on and nothing, all it does is crank and crank, then if yo...
2005 Chevrolet Colorado Sport 3.5L Starting VIN: 1GCCS14895
Truck has intermitten no start problem occures hot or cold wait time between starts is approx. ten minutes good battery ck grounds and perform wiggle test cannot duplicat problem in shop
1995 Geo Prizm LSi 1.8L MIL Lamp on VIN: 1Y1SK5289S
both o2 sensors are reading voltage. tested at diagnois connector under hood. genrally both stay around .45 volts at idle. they will drop down to .100 at times and go up as high as .55 volts but these are very gradual transitions. like the computer is not cont... Trouble codes: 21 (o2 sensor or circuit problem), 27 (sub o2 sensor or circuit problem)
1997 Pontiac Grand Am SE 2.4L lifters, valves VIN: 1G2NE52T1V
Hi there fellow techs, Thanks in advance for any help. I have inherited this vehilcle from another shop. Apparently came in with a jumped chain, six valves were bent so the head was rebuilt and the chain was replaced. When the vehicle was started it ran fine f...
2003 Saturn L300 3.0L MIL Lamp on VIN: 1G8JW54R93
starts, runs , no power on accell., cat. convertor was replaced 2 months ago at other garage, towed in here, starts, no power on accell, has several egr codes, ,removed egr to drive has power, not sure why cats, may be plugged again , am going to remove exhaus... Trouble codes: P0402 (exc egr flow), P0403 (egr sol. circuit problem), P0405 (egr sensor sig. short / low)
2007 Saturn Vue 3.5L air bag VIN: 5GZCZ63477
I have a 2007 that came into my shop with air bag lite on, i scanned it and came up with code b0092. pulled it up on the computer and it informed me to dry out the passenger seat cushion. Well the customer has stated with great expression that he didn't waste ...

Fixes & Summaries for GM
Fix/Summary Answers
2004 Buick Rendezvous CXL 3.6L MIL Lamp on VIN: 3G5DB03754
Checked all wiring we had came to the conclusion the ECM was possibly bad .But the customer decline repair.Sorry for the lack of Info. Thanks Again, Toney
1990 Chevrolet C1500 Silverado 5.7L No Start VIN: 1GCDC14K6L
Hi guys, Thanks for all the informative replies. Although I would like to mention many suggestions were for items which had already been covered so please read each post carefully to determine what has been done already. As mentioned I had installed a known go...
1999 Chevrolet Blazer LT 4.3L interior lights VIN: 6516846515
well this one is fixed ,thanks to all replies .someone had the glove box light connecter plugged in to the door jam switch.
2000 Chevrolet Silverado 1500 5.3L Poor Idle Quality VIN: 2GCEK19T9Y
Well I replaced the Intake Gaskets and it runs well and I have a happy customer thanks to all who replied. Brian Trouble codes: P0300 (Multiple Misfire).
2002 Chevrolet Silverado 2500 HD 6.6L waterpump VIN: 1GCHK23112
This one is gone for now. I told him the pump he supplied was the cause of the problem and would need to be replaced. He was fine with that until I told him I would be charging him labor to do the job twice. I tried explaining that if we had supplied the pu...
2002 Chevrolet Cavalier 2.2L MIL Lamp on VIN: 1G1JF52F23
the computers converse in a square wave pattern 7v on 0v off with an average of 2.7 not 3.5v that you would think. i had tried several module combinations with no luck. i had no ac voltage leaking past the diodes. the vehicle was sent to the local gm dealer wh... Trouble codes: U1064 (loss of comm w/ bcm), U1301 (class 2 shorted to battery), U1000 (loss of seral communicaton 4 class 2), U1016 (no state of health from pcm), U1088 (loss of comm with sdm-sir).
1997 GMC C1500 Sierra SL 4.3L No Start VIN: 1GTEC14W5V
Thanks to all who replied, I appreciate that you took the time. As many suggested I look closer at the plugs and cap/rotor. They where fairly new and did show signs of wear. The plugs where Autolite and cap/rotor unknown. I decided to replace all with AC De...
2004 GMC Envoy XL SLE 4.2L Stall, MIL Lamp on VIN: 1GKES16S94
I had some responses that included replacing the camshaft actuator, which we already did for leaking oil into the connector. Also had someone suggest replacing the camshaft sensor which appeared to be working fine when tested. We did the crank relearn again an... Trouble codes: P0016 (Camshaft and Crankshaft Position Correlation Problem).
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