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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for January 31, 2011
International Automotive Technicians' Network (iATN) - Members Only
(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
1981 Chevrolet Camaro Z28 5.7L headers glow VIN: 1G1AP87LOB
hello all, the info. on my vehicle is not necessarily true, I only had so many options to choose from. It actually has a 383 stroker 500hp 470trq. I haven't done any checking yet since car is in storage for now. I noticed after running for about a half hour th...
1994 Chevrolet Astro 4.3L Engine VIN: 1GNDM19W3R
Hi everyone and thank you in advance for any help. I have an 94 Astro that runs fine with good fuel pressure, starts good has plenty of power. However when it is idling it will just stop running as if the key was turned off. It starts right back up and sometim...
2001 Chevrolet Tahoe 5.3L Oil Pressure VIN: 1GNEK13T01
Customer came in with oil pressure light on most of the time which we verified with a gage. There has been no engine noise associated with the low oil pressure. We pulled the pan and found a partially blocked pickup screen, and replaced it and the oil pump. St...
2003 Chevrolet Malibu 3.1L MIL Lamp on VIN: 1G1ND52JX3
U1000 stays current in PCM only. SDM,BCM,Radio,Remote fuction actuator, all comunicate. RFA had a history code B1327, devicepower circuit low code (cleared not returned). Does not have ABS. All know modules communicate. Fuses all have Batt voltage with the key... Trouble codes: U1000 (No state of health from module)
2004 Chevrolet Cavalier 2.2L Poor Idle Quality, Surge, Cuts out, Stall, Misfire, Poor Fuel Economy VIN: 1G1JC52F04
I have a cavalier that has a rough idle,stalls at stops,and runs very rich.have checked/replaced coil cover,plugs,map sensor with no change(all factory parts).have checked for vac.leaks with none found.no mass air flow sensor,although it acts like a bad one.an... Trouble codes: P0300
2004 Chevrolet Silverado 2500 HD 6.0L abs VIN: 1GCHK23U14
Help GM techs! This truck has an issue with the ABS light and brake light illuminated on the dash, ABS inoperative and Control unit not communicating with any scan tools. Based on tests recommended by IATN and our information available to us we recommended ABS...
2007 Chevrolet Aveo LS 1.6L Abs VIN: KL1TG56607
OK guys this is a weird one, and I would like some direction on it. It came in for a brake service and it needs one but thats not all. The brakes feel spongy sometimes but not all the time. The ABS light was on and after talking to the customer she said "ohh y...
2010 Chevrolet SILVERADO 5.3L Contorl Arm Bolts VIN: 3GGCRKE37A
Has anyone seen the eccentric bolt nuts back off on these vehicles? I have had a few that got loose after someone else aligned them. However, I aligned this one and a month later the rf rear bolt nut loosened and caused cam to slip. I have tightened these nuts...
1999 GMC Safari SLE 4.3L Poor Idle Quality, Hesitation, Stall VIN: 1GKEL19WXX
Ok everyone this one has truly got me.he is your avearge gmc safari van with 4.3 vortec motor.well I am having such a hard time trying to figure out why after you drive this van 5 or 6 miles it will come to a stop and die.then it is hard to restart and when it... Trouble codes: P0301
2002 GMC Sonoma SL 4.3L MIL Lamp on VIN: 1GTCS19W02
Trying to get information, about what running fuel pressure should be and if there has been many common complaints in this area Trouble codes: P0171 (p0174-), P0174 (testing and results)
2004 GMC Sierra 2500 HD 6.6L Tow mode VIN: 1GTHK23134
Hello Techs! On this truck we have replaced the shift lever (this one includes tow mode and OD switch on the lever)in October 2010, just recently, the icons on dash for Tow Mode and OD over ride will come on randomly. If vehicle is shut off the icons are clea...
2007 GMC Sierra 1500 SLT 6.0L abs module VIN: 2GTEK13Y97
keeps setting c0161 brake switch circut will set at any time not just at the parameters in the code description. have checked voltages to the bcm from the switch and they are steady
1997 Pontiac Firebird Trans Am 5.7L No Start, Stall VIN: 2G2FV32P5V
This LT1 Trans Am shuts off and won't restart right away intermittently. Runs good otherwise, doesn't sputter or miss, shuts off like turning off the key. When it restarts it fires right off and runs good. The one chance I had to test it not running it had no ... Trouble codes: P0161
2005 Pontiac G6 3.5L Suspension VIN: 1G27G52865
Pontiac was brought to me for complaints of rattles in rear. Found a broken coil spring in the right rear. However, I could not duplicate the thumping with the vehicle on the lift. Everything seems tight, nothing sloppy. The shocks had 99000 miles on them, and...
2006 Pontiac Montana SV6 3.9L Engine cooling system VIN: 1GMDV33186
Customer originally complained of poor heater performance at idle; flushed system & replaced t-stat, inspected for leaks, put vehicle on deck truck to elevate front end and remove trapped air, replaced upper heater hose with temporary piece with bleeder screw,...
1997 Saturn SL2 1.9L Stall VIN: 1G82K5275V
starts and runs great for 15 minutes then quits. no fire to plugs. wait five minutes and starts and runs great for 15 minutes. help''

Fixes & Summaries for GM
Fix/Summary Answers
1993 Buick Skylark Limited 3.3L Starting VIN: 1G4NJ54N6P
Sorry it took so long to post fix. Just wanted to make sure it was fixed. As it turned out. Not only a bad crank sensor out of the box the computer was powering up the ground signal to crank sensor. The replacement computer had Theft Deterrent and car did not....
2001 Oldsmobile Aurora 4.0L Dome Light VIN: 1G3GS64C11
This domelight/int lighting ckt is pretty extensive. Goes to all 4-doors, above headliner, under back seat, and through dash. Controlled By DIM module & RIM module. After tearing the apart & locating the main splices# 306 & 310 under backseat and doing pin ...
1998 Pontiac Grand Prix GTP 3.8L HVAC controller VIN: 1G2WP1216W
Thanks for all the input. The problem was a single wire in the harness just before the hvac controller. It is supposed to be disconnected for Fahrenheit readings or connected for celsius. We didn't realized it was disconnected when we took it apart.
1998 Pontiac Grand Prix GTP 3.8L Engine temperature VIN: 1G2WP1216W
You guys are great. thank you for sending so many replies. The problem was a very slight leak in the head gasket. We changed them out with OE and it's working great!
2001 Pontiac Aztek 3.4L rear brakke VIN: 3G7DAEO301
Thanks for most of the input guy's it was getting late on friday so I had customer pick up vehicle until I had some good idea's to go after and we'll reschedule at that time. I did find out that there has been two other sets of drums put on this vehicle for th...
2003 Pontiac Grand Am GT 3.4L No Start, Stall VIN: 1G2NW52EX3
sorry guys, but the vehicle was picked up by customer cause we could not repeat customer concern anymore. so obviously by the replies we got the ign switch would be the right thing to look at.. Thanks for the info Iatn users.. Trouble codes: U1040 (b2958-), B2958 (u1000-), U1000 (u1088-), U1088 (testing and results).
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