GM Automotive Technicians Technical Discussion and Fixes for Jun 2, 2004 - iATN (Members Only)

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Open Help Requests for GM

	Help Request	Answers
	1991 Buick Park Avenue 3.8L Blower VIN: 1G4CW53L6M This car has Manual Climate Control system. The owner says that with AC on the blower stops working for as much as 5 mins. The blower never stops working when heat is on. I mainly only work on Nissan's so this is a strange problem to me. I have done checks tha...	View
	1992 Buick Regal Gran Sport 3.8L compressor VIN: 2G4WF54L6N after you drive car a week or so cust comes back in and the ac comp dosn't engage if you disconnect battery and wait a few minuets and reconnect battery ac system works fine. compressor is on and vent temp very cold i have replaced the low press switch and hig...	View
	1994 Buick Roadmaster 5.7L pw steering pump VIN: 1G4RF57G6F this vehicle came in with no pw steering. the pw steering pump has not making any noise. belt is good and no pw steering fluids leak. i determant that the pw steering pump has no good. i put in a new pump bled the system. pw steering was ok for 5 min then lose...	View
	1985 Chevrolet C20 Scottsdale 5.7L belt pulleys VIN: 1GCGC24M5F this is a truck that has been sitting for quite some time and had a good deal of rust on the belt pulleys. we've done our best to remove the rust but are still losing belts. any recomendations for repair? or tricks/timesavers for removing rust from the grooves...	View
	1993 Chevrolet K1500 Suburban Silverado 5.7L axle seal VIN: 1GNFK16K5P Hey guys, this is my personal vehicle. I put a rebuilt rear in and had a axle seal leak on the left side. Replaced the seal, inspected the axle shaft for wear, looked alright.My question is, its been along time since working with rwd cars.What is the most comm...	View
	1994 Chevrolet Cavalier Z24 3.1L Poor Idle Quality, Surge, Misfire, OVER FUELING VIN: 1G1JF14T2R hi all, thank you in advance for any help provided. this car stumbles - dies - over fuels - runs like death all of the time. we checked fuel pressure - normal - found no fuel leaking through pressure reg. to vac. line - injectors hold fuel pressure overnight a...	View
	1995 Chevrolet Camaro 3.4L No Start, Misfire VIN: 1T2G1FP22S Oh where do I start on this one. Another shop installed a 1995 Camero 3.4 into a 1988 Jeep Cherokee using a painless wireharness. It includes a module to satisfy the Pass II antitheft system. It has not started since it was installed they worked on it for 2 mo...	View
	1996 Chevrolet Monte Carlo Z34 3.4L Poor Idle Quality VIN: 1GMEKKKEKE this vehicle has no trouble codes and could not detect any vacume leaks. engine run good but has idle problem. the idle take about 30 second to idle down after every accelarate. i tested the iac motor with scanner and i can cammand to idle high with a fast res...	View
	1997 Chevrolet Express 1500 5.0L Excessive Emissions, Misfire, MIL Lamp on VIN: 1GBFB15M4V First time customer came in reporting a "miss" and CEL illuminated. Found P0300 recorded. Ignition scope indicates low secondary demand on cyl #'s 3 & 5. Checked plugs, found Cyl #'s 3 & 5 to be fuel fouled, and although the plugs are worn on all cylinders th... Trouble codes: P0300 (Random misfire)	View
	1998 Chevrolet Malibu LS 3.1L front end noise VIN: 1G1NE52M6W This vehicle came in with a very noticeable clunk/rattle in the front end at low speeds -hard to determine which side in particular- front end was in need of new struts,links,outer tie rod ends and alignment. Other suspension parts were inspected as well such ...	View
	2000 Chevrolet Prizm 1.8L MIL Lamp on VIN: 1Y15K5284Y Looking for some help for this Prizm. Last week it was in for an evap code. I went through the All-Data trouble diagnostics for this code and it came to the finalization of replacing the fuel tank pressure sensor. I did and the light is back on. Has anyone com... Trouble codes: P0440	View
	2000 Chevrolet Silverado 1500 5.3L Poor Idle Quality, Hard start VIN: 2GCEC19T2Y Hey Guys, I have this C1500 with 5.3 with a poor idle(almost feels like a slight misfire) and some times hard to start. No codes present buton the snap on scanner B1S2 and B2S2 go to 0 at idle and wake up again after reving engine.I did recheck the fuel pressu...	View
	2000 Chevrolet Corvette 5.7L Turn Signals Customer complains of inoperative turn signals. I've been unable to duplicate this complaint, much less to test it. In the past few cases of intermittent turn signals, the flasher, which is incorporated into the emergency flasher switch, has been at fault. The...	View
	2002 Chevrolet Malibu 3.1L no power in gear VIN: 1G1ND52J22 fuel volume is good, maf sensor range in limits, map sensor good,tps is good, egr system good, ign. module good, exhaust flow is good. vehicle idles fine in park and neutral,when put in gear vehicle has no power off of idle.	View
	1998 Oldsmobile Regency 3.8L Mechanical VIN: 1G3HC52KSW Customer complained about a small oil leak. I checked & it looked like a leaking oil pan. Removed pan & replaced gasket. Still leaked. I checked again & every bolt had a drop of oil on the head, I removed each bolt & cleaned with brake cleaner & put silicone o...	View
	2001 Oldsmobile Aurora 3.5L Poor Idle Quality, Misfire, Fuel gage E to F VIN: 1G3GR62H51 Need help. have not worked on many of thies. Car came in for miss and check engine light on. fuel gasge would not go over 1/2 tank and jurked in reverse. Have checked grounds and wires from computer to front IC bank. all look ok after I take car out and drive ... Trouble codes: P1366, P0300	View
	2000 Pontiac Montana 3.4L instrument panel VIN: 1GMDX03E6Y This vehicle came in with the complant that all the guages quit working at times. We could never get it to act up but we saw a TSB on a similar problem (#01-08-45-005a). This was to check the connector under the body behind the driver's seat. We did this but d...	View

Fixes & Summaries for GM

	Fix/Summary	Answers
	1990 Buick Century Custom 2.5L No Start VIN: 1G4AH54R8L yes thank you all for the help. it turned out to be the ecu, and we used the old prom from the original computer and everything worked out great. fuel pressure and everything worked great. thank again for all the help	14
	1988 Chevrolet Celebrity 2.8L No Start, Stall, MIL Lamp on VIN: 1G1AW51WXJ thanks to all who replied.. All replies were very helpful. This Vehicle was Fixed in the second day of this posting. I also would like to note that I had 23 replies on the second day of this posting and most were right on. It was a Bad ECM. I finally was able ... Trouble codes: 64 (MAP sensor Voltage Low), 65 (na), 66 (na).	27
	1991 Chevrolet Lumina 3.1L Poor Idle Quality VIN: 2G1WL54TOM We could not fix this problem. We had already tried everything the other iatn members sugested. The RPM would go to 1500 to 1800 and stay there until the car came to a complete stop and then it would drop to 500. The only thing that would make a difference was...	10
	1994 Chevrolet Caprice Classic 4.3L 3rd gear at stop VIN: 1G1BL52W8R Thanks to those who replied (six in all). Harold [...] hit it right on the head. Computer would cammand 3rd gear.If I cleared codes it would shift fine for the first two or three accels an decels then would through code 84 again and stick in 3rd and command th...	6
	1997 Chevrolet Malibu 3.1L Poor Idle Quality, Misfire VIN: 1G1ND52M2V Well everyone, I would like to spend a moment to thank you for all of the help you have given me. All of the advice was usefull and some things made me think the car was fixed...for a short amount of time. After hours of fighting this beast my boss called over... Trouble codes: P0300 (Random cylinder misfire detected).	7
	1998 Chevrolet K2500 Cheyenne 5.7L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire VIN: 1GCGK24R4W First, thank you to those who replied. I found 2 seperate problems effecting the fuel injectors. The first was low pressure cut off @ the poppets and preforming the update corrected this and most of the driveability prob. Truck ran good but still had an inte...	10
	2000 Chevrolet Silverado 1500 5.3L Long Hard Start VIN: 1GCEK19T3Y Thanks to everyone for all your help. Everyone was exactly right about it being the fuel pressure regulator. Had customer bring back in, pulled vacumn line off and found gas in the line. Called the dealer, they had 5 of them on the shelf (there I knew there wa...	21
	1992 GMC Jimmy SLE 4.3L Poor Idle Quality, Cuts out, Stall VIN: 1GKDT13Z3N I was correct in my diagnosis; the connection at the ECM for the right side injector was poor. The ECM plug has a plastic retainer for each row of pin connectors that is removable. Each connector also has a barb that keeps them in the plug. I wasn't able to fi...	3
	1990 Oldsmobile 98 Regency Touring 3.8L Compressor Oil VIN: 1G3CV54C4L Thank you to all that have replied to the question. I see that Ester oil can cause moisture drop-out in high moisture conditions. Lubricating properties were said to be better with PAG at higher temps.Thanks again.	11
	1992 Oldsmobile 98 Regency 3.8L Electronic Ride Leveling VIN: 2FR12344TY Thanks for the pointers. It was time to give up the test light method of determining draw on late model, option loaded vehicles. It turned out the only real problem is the ride control is getting overactive from leaky rear air shocks, trying to keep them pumpe...	12
	1998 Oldsmobile Intrigue GL 3.8L No Start VIN: 1G3WS52K7W This car did not start because the spark plugs were fouled. I realize that this was something simple that I overlooked, but there is more. The reason that the plugs fouled was because of a blown head gasket! With a new set of plugs the car started, blowing whi...	8
	2000 Pontiac Grand Am SE 3.4L ABS Light VIN: 1G2NF12F6Y I cleaned grounds but they did look good any ways. Checked computer connections and again look good. Cleared codes and test drove several times and the light never came back on so customer is going to try driving and see if light comes back on. I still think t...	6
	2002 Pontiac Grand Am GT 3.4L door locks VIN: 1G2NW52E32 Well I haven't had a chance to look at the car yet so I don't have it fixed. The 3 reply's I got said to check for broken wires in the door jam, the relay's under the left side of the dash, and for communication between the BCM and lock switches. These all sou...	3

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