GM Automotive Technicians Technical Discussion and Fixes for Jun 21, 2007 - iATN (Members Only)

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Open Help Requests for GM

	Help Request	Answers
	2000 Buick Regal LS 3.8L dome lites VIN: 1GT1HFGSKO fuses good,trying to by pass bcm to confirm but still cant get lites to come on with power probe.and also door and trunk ajar lites are on and shift performance lites are on in ip.	View
	2004 Buick LeSabre Custom 3.8L MIL Lamp on VIN: 1G4HP52K34 Hello gentlemen, I have here an 04 LeSabre with a Po442A for the second time in 3 months. I have smoked from the purge solenoid back while shutting the canister vent valve with a scan tool. No smoke found. Checked for smoke all down the vapor line, canister, f... Trouble codes: P0442	View
	2000 Cadillac Eldorado ESC 4.6L Compressor VIN: 1G6EL12Y5Y Customer came in from another shop. They replaced the compressor, accumalator, and orifice tube but could not get compressor angagement. We had to replace both evap temp sensors to clear the codes to charge. The compressor would engage for about 10 seconds and...	View
	2005 Cadillac STS 4.6L Navigation System GM Techs, I hope this is a simple one. My brother has this 2005 STS and wants to know if there is a way to make entries into the navigation system without putting the vehicle in park. It's driving him crazy that his wife or other passenger can't enter informat...	View
	1996 Chevrolet Cavalier 2.4L fuel smell VIN: 1GM7HF7UIO I have a 1996 chevy cavalier it has a fuel smell after shutting the car down near the canister the can was replaced purge valve were replaced no evap dtcs were found my main question is the vent valve on the canister should there be power there to close the va...	View
	1997 Chevrolet Blazer 4.3L Ignition Switch VIN: 1GNDT13WXV Hi IATN, This Blazer came in with a complaint that he could not always get his key out of the ignition. He states that he sometimes has to wait 30 seconds to 3 minutes before he hears a click and he is able to turn the switch to the lock position an retrive hi...	View
	2000 Chevrolet Silverado 1500 5.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GCEK19T7Y Vehical was here two weeks ago for diag of MIL. At that time only DTC p0300b ws present. Bank one was adding fuel and bank 2 was subtracting fuel. Y pipe and o2 sensors were coated with mud and stuff. Repair trac info and fix database show pattern converter fa... Trouble codes: P0200, P0300, P0463	View
	2001 Chevrolet Lumina 3.1L poor braking VIN: 2G1WL52J91 work better cold, than it does hot, stopping distance is longer than normal, abs works ok, caliper move real easy, rear shoe adjusted ok, no vacummn leaks at booster or hose assembly,stopping power low, brake petal feels ok, compaired to other gmc car the same...	View
	2003 Chevrolet Impala 3.8L Airbag VIN: 2G1WF52K33 This Impala is flashing the airbag light on intermittently. I retrieved a B0100 (Electronic Front End Sensor 1 Fault). There are a grey and yellow wire at the sensor. The grey wire has no short to ground, power or the yellow wire. The yellow wire on the other ...	View
	1987 GMC G3500 Magnavan 5.7L all 4 wheels VIN: 2GDGG31K8H About a week later this thing comes back in all 4 wheels are locked up, backing off the Master Cylinder mounting bolts have allowed the the fronts to unlock but there is still lots of resistance, anyone run into this before!	View
	1991 Pontiac Sunbird LE 2.0L No Start, Poor Idle Quality VIN: 1G2JB54K7M Hey, GM Techs I need help! My customer just purchased veh a week ago for his daughter, and he says it stalls at stops unless a/c is on then its ok, so I looked her over and no codes and road tested and sure enough she dies will a/c off and ok when on. I cleane...	View
	1994 Pontiac Firebird 5.7L No Start VIN: 2G2FU22P9R Customer brought car in with complaint of int running rough , had start , no power or just cranks no start - he had it to dealer who replace pcm and injectors and then told him they dont know what to try next and sent him away 0 we replaced mass air flow senso... Trouble codes: 18 (injector circuit fault), 48 (mass aitr flow sensor)	View
	1998 Pontiac Grand Am SE 2.4L Poor Idle Quality, Misfire VIN: 1G2NE12T5W thank you in advance,this car came in last week with check engine light and running bad. checked codes found only one,p0301 misfire on cylinder #1.pulled tower assembly,tower was cracked and coils have been arching. we replace coils,boots,tower and plugs.car l... Trouble codes: P0300	View
	2001 Pontiac Grand Am SE 3.4L No Start, Stall VIN: 1G2NF52E72 This vehicle was towed in with a no crank situation. the customer stated that her husband could tap starter and it would ussually crank.(not this time). I replaced the starter and now the car cranks,but stalls immediately. I figured it was security system from... Trouble codes: U1064 (Loss of bcmvtd data), P1626 (Theft system enable lost)	View

Fixes & Summaries for GM

	Fix/Summary	Answers
	2002 Buick Park Avenue 3.8L Alarm VIN: 1G4CW54K82 I recieved 3 replies, but unfortunately, the customer has not returned, and I haven't been able to do any further testing. From the replies, therew may be a way to disable the alarm, but nothing for sure. If the car returns I will update this post at that ti...	3
	1989 Chevrolet Corvette 5.7L No Start, Poor Idle Quality VIN: 1G1YY3185K Thanks to everyone who responded. We tested the injectors when hot and found 2 at 6 ohm or less. Knowing from the replies that even 1 failed injector can short the circuit, we replaced all the injectorss. This solved the problem. Because of your help it s...	15
	1992 Chevrolet K2500 Cheyenne 6.5L overdrive code 68 VIN: 1GCGK24F9N It is fixed. Kevin from Arizona Explained to me that my speed sensors are reading correct because the input sensor reads off the forward drum which is after the OD ratio. So 3rd and OD read the same on both speed sensors. I have to give thanks to Gary at freew...	3
	1999 Chevrolet K1500 LS 5.7L Poor Idle Quality, Misfire, Poor Fuel Economy VIN: 1GCEK19R5X Well guys thanks for all the replies all were very helpful it turn out to be a combination of things wrong it did have a bad 02 sensor on right bank also some of the carbon off the old convertor had clogged the exhaust pipe between the convertor and mufflers a... Trouble codes: P0300 (Radom misfire).	10
	2002 Chevrolet Silverado 1500 4.8L No Start VIN: 2GCEK19V6X INSTALLED ECM AGAIN, COULD NOT FIND CAUSE OF FAILURE, TIME WILL TELL	9
	2005 Chevrolet Cavalier 2.2L No Start VIN: 1G1JC52F95 Well, an ignition switch fixed this no start as these switches and associated security system is problematic. What a terrible feeling I have as we were chasing fuel and pump power and started with a bad diagnosis then kept on that trail. Thanks for everybodys ...	4
	2002 Pontiac Grand Am SE 2.2L No Start VIN: 1G2NE52F92 Tank you guys, the help was exelent it came out to be a defective ignition lock cylinder, replaced it and corrected the problem I am greatful to you, my customer is satisfied.	15

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