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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for December 26, 2008
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Open Help Requests for GM
Help Request Answers
2000 Buick Century Custom 3.1L blower vents VIN: 2G4WS52JOY
Thanks in advance, I know you guys will fix this one. We have a 2000 Buick Century, with dual zone, manual climate control. The original complaint was no heat. After checking, the issue is actually we just get no blow out the vents. The engine gets up to temp ...
1995 Chevrolet Lumina 3.1L fans inop VIN: 2G1WL52M8S
Vehicle is running hot with no cooling fan operation. Code 14 came up with snap-on scanner, and I tested the coolant temp sensor as guided. with the sensor jumped the fans come on for one second. All of the readings during the test were as the scanner said the...
1996 Chevrolet C1500 Cheyenne 4.3L Excessive Emissions, Poor Fuel Economy, MIL Lamp on VIN: 1GCEC14WXT
vehicle came back with customer complaining of poor fuel economy. said truck ran good for about one week then he noticed lots of carbon coming from exhaust when idling and fuel mileage down. have checked fuel pressure, fuel pressure regulator and egr all look ...
1999 Chevrolet Tahoe LS 5.7L gas needle VIN: 1GNEK13R0X
whats up fellows, just trying to find out a gas gauge needle vibration, i've replaced several fuel pumps on chevy's and it seems after several months the needle starts to vibrate, but no problems with any of the trucks. i've replaced each one with a know good ...
2000 Chevrolet S10 4.3L No Start VIN: 1GCDT13W31
We have no fuel pressure. We first went through and checked to see if the filter was plugged and it was not, fuel flowed out of filter when keyed up. but no pressure when checked with gauge. pulled lines out from above intake and had flow out of pressure side,...
2001 Chevrolet Blazer LS 4.3L Excessive Emissions, Poor Idle Quality, Misfire, KICKS BACK CRANKING VIN: IGNCT18W31
truck towed in cranks will not start this is the second time it was towed. has good fuel pressure and spark. plugs maf and map new. is flooded clear cylinders and cleaned plugs during cranking it kicks back also pops through intake. will eventually start. when...
2001 Chevrolet Silverado 2500 HD 6.0L Spark plug VIN: 1GCHK209V7
Customer restarted vehicle hot this morning and blew out #4 spark plug and what appears to be a helicoil type insert. I assume this insert is factory because we did the only plug change on this truck at 68,000 miles and had no problems with the plug holes at t...
2001 Chevrolet Express 2500 5.7L Poor Idle Quality, Hesitation, Cuts out, Misfire, MIL Lamp on VIN: 1CGCG25R11
checked fuel pressure and tried to set timeing relearn and scanner showing error message.ckecked fuel pressure listed also has no misfire codes.and no misfire on the misfire monitor. we did check for 12 volts at crank sensor lt green wire has a good voltage he... Trouble codes: P0341, P0335, P0405, P1345 (ckp/cmp correlation promlem)
2001 Chevrolet Cavalier 2.2L No Start VIN: IG1JC52401
Hello all. Happy Holidays. CALLING ALL CHEVY GM TECHS!!! I am up against the wall on this cavalier. Car was towed in for no-start; cranks ok. Checked codes none. NO CODES STORED OR PRESENT IN ANY MODULE!!! Ck spark good. Check fuel pressure- none. Power & grou...
2004 Chevrolet Silverado 2500 6.0L instrument abs light VIN: 1GCHK29U34
imtermittent abs and parking brake dash lights coming on, service brake system message come on in message board , hooked up to genysis no codes were found, when abs lights go on truck brakes fine, can,t seem to duplicate symtom in shop.
2006 GMC Envoy XL SLT 4.2L cam phaser
Customer brought vehicle in for suspected altenator noise. Diag. with stethoscope found a loud buzz/whine type noise in cam actuator area in vale cover. Allmost sounds like a mild power steering pump whine except under accel. it gets much louder.has anyone run...
1999 Pontiac Grand Prix GT 3.8L Cuts out, Stall VIN: 1G2WP12K8X
This is two maf that has appeared to be bad what am i not seeing Is there anything i should check that might not show up in a diagnostics
2000 Pontiac Grand Prix GT 3.8L none VIN: 1G2WP12K4Y
Have this po481 code tested coolant fan circuit code for 2 but checked all voltage ground and ref. all circuits work fine no problems with car only engine lite on only thing changed on car was blower motor and temp. control both from dealer code not present un...

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick LeSabre Custom 3.8L No Start, start and die VIN: 1G4HP52L65
Thanks to everyone on all the great suggestions. Let me start by telling what did not fix it. I got some crazy idea of my own to replace computer, no fix. Put back on original computer,talked to a locksmith friend of mine and he seemed to think that by this ... Trouble codes: 123 (throttle position high), 670 (qdm4 failure), 406 (egr pintle position error).
1993 Cadillac Seville STS 4.6L Braking system VIN: 1G6KY5296P
We would like to thank all those who responded and gave us advice. In the end it ended up being the master cylinder was bad again. The customer had replaced the original with a [...] unit th...
1994 Chevrolet K1500 5.7L No Start VIN: 2GCEK19K3R
Well guys, the truck finally did not start this morning, i took the ecm out, and warmed it up in the shop, but that did no good, tried a new coil, checked all the grounds, all did no good, still no start. I decided to try a new Ignition Module, and it started ...
1997 Chevrolet Cavalier 2.2L No Start VIN: 1G1JC5242V
Iatn and my power probe are the best tools I have bought for driveability work. You guys rock!! 10 responses in 3 days. I am going to go ahead and close this one, and maybe start a new one next week. Turns out I had 3 different issues,John [...] nailed one, ...
2001 Chevrolet Silverado 1500 5.3L Cruise control VIN: 2GTEC19T41
I really appreciate the time involved with the replies I received. I'm closing this due to time. I haven't corrected this problem as the customer won't return with the vehicle until I can difinitivily tell him if his BCM is bad or not as it appears the speed s...
2004 Chevrolet Silverado 1500 4.8L Misfire, MIL Lamp on VIN: 1GCEC14V44
Hello group, hope everyone had a wonderful CHRISTmas holiday. Just getting around to closing this out. After further testing, ran a static and running compression test on truck nand readings were good. Also removed the valve covers just to make sure did not ha... Trouble codes: P0300.
2004 Chevrolet Suburban 2500 LS 6.0L shifting issues VIN: 1GKFK66U54
ignition switch was bad however still had other solonoid defective from chev so techs test parts before installing i know you shouldnt have to but it would have saved me a couple of hours . thanks too all who have helped
2001 GMC Sierra 1500 SL 5.3L Radiator VIN: 2GTEC19T41
Well I hope everyone has had a good christmas, I will close this post know and I am thinking it could help someone in the future. I did talk to our supplier, they had there rad rep out to our shop last week, so they are aware of the issue and hopefully it get ...
2001 GMC Yukon XL 1500 SLT 5.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GKFK16T71
I would like to personally shake hands with all of you fine folks for saving my butt. It did turn out to be the intake gaskets, which I was able to show my customer via the datastreams I recorded (I highly recommend the MAC flight recorder made by launch) bef... Trouble codes: P0101, P0300, P0171, P0174, P1133 (O2 Sensor Not Switching Bank 1), P1153 (O2 Sensor Not Switching Bank 2).
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