GM Automotive Technicians Technical Discussion and Fixes for Apr 7, 2007 - iATN (Members Only)

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Open Help Requests for GM

	Help Request	Answers
	1995 Cadillac DeVille 4.9L ebtcm VIN: 1G6KD52B3S hello to my fellow techs that keep this great nation rolling! this 95 caddy is trying to get one over me, my customer brought her car in saying that the ABS& TRACION DISABLED lights are coming on. if she restarts the car they will reset untill a few minutes of...	View
	1995 Cadillac DeVille 4.9L abs VIN: 1G6KD52B8S Id like to start by thanking everyone who takes the time to read this. This car has an intermittant brake code TO61-BPM circuit problem. (This car origanally came in with multiple engine, abs, suspension, and instrument panel codes and this is the last one, I ...	View
	1995 Chevrolet Caprice Classic 5.7L Poor Idle Quality, Cuts out, Misfire this is one my friends sons car they have been messing with it thats why the new plugs and wires the sticker under hood says 4.3l but it is a 5.7 TPI and i cannot use my SOLUS scanner unless there is way to cercomvent the VIN because by the is has a 4.3l anywa...	View
	1996 Chevrolet Lumina 3.1L Hesitation, Cuts out, Poor Fuel Economy VIN: 2G1WL52M90 hi this is my own vehicle when accelerating timing retards about 20 degrees and vehicle looses all power. have snap-on scanner to watch sensor operation.have replaced knock sensor,map sensor,ignition module no codes present.	View
	1997 Chevrolet Astro 4.3L No Start VIN: 1GTDM19W4V this van is a no start no communication to snap on scanner. im wandering if any one can tell me which wires to check to see if the computer is operating.all other no comm. problems i've had were either a fuse or a wire but these are all ok.	View
	2000 Chevrolet Silverado 1500 5.3L Radio Um6 Removed head unit check power and grounds, all good I installed a similar unit with same #number, same problem. back probe and install a known speaker into rt/lt side speakers no sound. Radio turns on will tune into station and set the ST light but no sound su...	View
	2000 Chevrolet S10 2.2L No Start VIN: 1GCCS1940Y Good evening Techs, Have a no-start with no codes. Have no ign spark, no injector pulse and no cranking rpm on red brick scanner. Replaced crank sensor, ignition module, PCM and still nothing. Mitchell says attach test light to batt positive and tap on crank c...	View
	2004 Chevrolet Trailblazer LS 4.2L Excessive Emissions, Poor Idle Quality, Hesitation, Stall, Misfire, pending codes only VIN: 1GNDS13S84 Came back 2 days later customer said it was running horribly. Pulled back in no mil, pending codes p0300 and p0014 misfire and cam position performance. Engine was running ok.Ran a few tests cam sensor quit rpm signal. Installed new cam sensor started engine r... Trouble codes: P0128, P0130, P0133, P0300, P0014	View
	2002 Pontiac Firebird 3.8L engine hey GM techs, heeeeeelp, neighbors car came whit pushrod noise, replace prds from dealer, noise' is not going, I hear the noise in the intake, not in the rocker arm. "please any help amigos" thanks advance	View

Fixes & Summaries for GM

	Fix/Summary	Answers
	2001 Buick LeSabre Custom 3.8L Misfire VIN: 1G4HE54K61 The fix to the car was a bad lifter and maybe the intake leaking but I really couldn't tell by looking at the gasket if it was leaking or not. But the car runs fine now. Thanks guys Trouble codes: P0300.	38
	2000 Chevrolet Cavalier 2.2L starter after two new switches in desperation i replaced the shift cable.the car started on the first try.thinking the orginal switch was ok i reinstalled it car would not start.put new switch back in started but no backup lights.to get backup lights to work i had to ...	8
	2005 GMC Envoy SLE 4.2L head bolts VIN: 1GKDS13S65 You guys hit the bolt on the head so to speak. Overwhelming replies said to hit the head bolt with a hammer and brass punch hard enough to shock it before attemting to remove. Works every time. Thanks again.	8

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