GM Automotive Technicians Technical Discussion and Fixes for Jun 22, 2006

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Open Help Requests for GM

	Help Request	Answers
	1991 Buick Regal Gran Sport 3.8L relay VIN: 2G4WD54L7M ok this abs pump motor relay is bad for sure runs the pump all the time,i tapped the relay and the pump stopped.tapped on the relay and pump started to run again. but the problem is this relay is nippon denso(part #[...])people at the dealer are telling ...	View
	1992 Buick Park Avenue 3.8L cruise control VIN: 1G4CW53L4N The cruise control on this Buick will engage when you set it, the light will come on and stay on but the cruise will only hold for about 30 seconds to a minute. After that it will slowly decrease in speed. It tries to hold sometimes, you can feel it surge slig...	View
	1996 Cadillac DeVille 4.6L a/c compressor VIN: 1G6KD52YXT a/c compressor cycles when vehicle is in motion. A/C COMPRESSOR WORKS NORMAL WHEN SITTING STILL IN GEAR AND ALSO WHEN RPM'S ARE RAISED.	View
	1997 Cadillac DeVille 4.6L compressor VIN: 1G6KD54Y5V A/C not cooling - no fire to compressor	View
	2003 Cadillac Escalade 5.3L not cooling/high low side pressure VIN: 1GYEC63TX3 this caddy came into the shop with no cold air. did evac/recharge, but still no cold air there is high low side pressure. it is an automatic hvac controls, scan tool wont connect to vehicle and cigar lighter doesnt work. has anyone seen this befor? any help wo...	View
	1992 Chevrolet S10 2.8L Excessive Emissions, Poor Fuel Economy VIN: 1GCCS14R0N Hi guys I have this 92 S10 that is running rich. The O2 is staying at 496 and goes to 500 mv,and thats all.Maybe shows 2 crosscounts. I replaced the fuel pressure reg. and O2 sensor after countless time spent.The owners tried 2 different computers and a map se...	View
	1994 Chevrolet C1500 Cheyenne 4.3L Hesitation VIN: 2GCEC19Z8R COULD USE YOUR HELP ON THIS ONE COVERD ALL THE USUAL BASES. Bad heastion off idle, and lack of power, idles smooth dies on take off, wot falls on face then picks back up and drives okay. fuel pressure good no codes since o2 was changed, fuel pump and filter ch...	View
	1994 Chevrolet K3500 Cheyenne 5.7L Axle play VIN: 1GCHK39F3R Hi there my fellow wizards, I have this customer that removed the front diff out of a Chevy 4x4 and brought to me to reseal because of axle seal leaks. We noticed that there seems to be excessive play in the short (left) shaft. At least .035"! (The long tube h...	View
	1994 Chevrolet Camaro 3.4L engine vibration goes away at approx 1100 rpm.	View
	1995 Chevrolet K2500 Cheyenne 7.4L Poor Idle Quality, Stall VIN: 1GCGK24N9S Good afternoon Problem child today is this tbi makes a loud buzzing noise, I have replaced the fuel pressure regulator thinking that is where the problem was, however no change in amount of buzzing. The other half of this problem is that the idle is very erra...	View
	1997 Chevrolet Express 1500 5.7L boggs down VIN: 1GBFG5R1V1 Customer thought and I agreed that it was acting like it was loosing a fuel pump. At times when you get into the throttle it will bogg down and will become practically undriveable for a period of time which may even be until you shut it off and restart. It alw...	View
	1997 Chevrolet Corvette 5.7L drivetrain VIN: 1G1YY22G3V Car came in whith unusuall noise uder car. sound like it was coming from torqu tube area. Upon tear down found the rubber isolators on driveshaft appeared to be rubbing inside tube. Replaced shaft to no avail. Still has thunking noise under accel and in revers...	View
	2001 Chevrolet Silverado 1500 4.8L MIL Lamp on VIN: 2GCEC19V21 I am posting this for a friend that is thinking about a membership.This vehicle will set a p0440 code as soon as it runs the evap monitor.The system appears to hold vacuum as it was tested with a vacuum pump.Don't know if the alt codes are related or not.Thank... Trouble codes: P0440 (evap large leak detected), P1637 (gen l term), P1638 (gen f term)	View
	2001 Chevrolet Tracker 2.0L MIL Lamp on VIN: 2CNBJ13CX1 hello, we have this tracker with a p0135 codeo2 heater problem,we tested the o2 and found the heater shorted, after replacing the sensor the mil comes back on,right away while warming up the engine,tested the wiring as per mitchell and alldata,leads to a bad p... Trouble codes: P0135	View
	2005 Chevrolet Astro 4.3L engine cooling VIN: 1GCDM19X85 i work on serveral of these vehicle and all have the same problem. They run fine and cool fine, but on hot days when driving and the a/c is on they all overheat. These are fleet driven vehicle and are on the road every day. No tsb's that i was able to find and...	View
	1996 GMC K1500 Suburban 5.7L abs VIN: 3GKFK16R4T abs light is on. w/ five codes, retaining to l/f speed sensor, and two for rear speed sensor. codes will not clear when trying to clear them. datastream shows constant readings on all pids, will not change while driving.also had a hard time getting the pids to...	View
	1994 Oldsmobile Silhouette 3.8L Poor Idle Quality, Misfire VIN: 1GHDU06L7R Thank you to all who respond. The engine in this van has a misfire on cylinder #4 with no codes present. The misfire is at the coil. If I pull plug wires off, I get a hot blue spark EXCEPT for #4. With the #4 plug wire off I can hear an arc which sounds as if ...	View
	1998 Oldsmobile 88 Royale 3.8L pwr windows, fuel pump VIN: 1G3HN52K1W this olds runs great, everything works power windows, locks, enigine runs great,alternator output is good, battery is new, all grounds & power feeds to all fuse & relays panels have been painstakingly checked for high resistance & proper power feeds. This thin...	View
	1994 Pontiac Firebird Formula 5.7L Excessive Emissions, Poor Idle Quality, Cuts out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 2G2FV22PXR i took out o2 on both sides and car stared up i then had alot of back firing in exhaused so i had a code for dist i replaced the dist with a rebuilt one and replaced cat converter then i cleared all codes ran then i got two new codesatfer it warmedup 44 and 18... Trouble codes: 18 (cranking pusle), 44 (lift bank lean condtion)	View
	1997 Pontiac Sunfire SE 2.4L alternator VIN: 1G2JB12TOV thanks in advance for everyones help. the vehicle came in with dead battery and no start, checked battery and alternator, both tested bad. called for approval and found vehicle had a alternator put in it in december of 2005. so under warranty we are replaced a...	View
	1999 Pontiac Montana 3.4L air bag VIN: 1GMDXO3EXX Van came in with air bag light on and the snap-on scanner shows code 1040 undefined code .I was wondering if anyone else has had this problem.Cleared the computer and code comes back.	View
	2002 Saturn SL2 1.9L No Start, Poor Idle Quality, Cuts out, Stall, Misfire VIN: 1G8ZK52732 This vehicle runs great until approx engine temp of 105 degrees - as per data stream- and the will start picking up occasional mis -fire , first intermittantly on one cylinder and then as it runs more to other cylinders unitl it stalls. Sometimes fires right b... Trouble codes: P1599, P1620, P0341, P0731	View

Fixes & Summaries for GM

	Fix/Summary	Answers
	1993 Buick LeSabre Custom 3.8L Master Cyl, ABS Controll VIN: 1G4HR5310N Sorry for the long close time, Our internet was down, After replaceing the front brake incl rotors, readjusting the rear shoes and completly re-bleeding the system (gravity) and a extended test drive by me for 4 days, I gave the customer the car he has driven ...	20
	2001 Buick Century Custom 3.1L Surge, Misfire, MIL Lamp on VIN: 2G4WS52J71 I finally figured out this beast and running like a champ. Let me say first of all thanks for everyone thoughts on the problem, gave me to some idea on how to proceed. The problem with the vehicle was that it was misfireing intermittently at low speed, intermi... Trouble codes: P0300.	11
	1996 Cadillac Seville STS 4.6L dash,radio,interior lights,no locks, VIN: 1G6KY5298T I just want to get back to close this vehicle with a fix. I put a new battery in the car,cut the cable ends off and installed new ones. Charging system volts vary from 12.3 - 13.9 and car hasen't give me a bit of trouble since. I want to thank all the guy's wh...	9
	1999 Cadillac Catera 3.0L No Start VIN: WO6VR52R9X Well I want to thank everybody that replied for my call for help,But the customer has not returned.If the customer does return and I am able to duplicate his problem I will post any findings.Thank you for your time trying to help me...Carl Trouble codes: P0455 (evap - gross leak), B1552 (Loss of BCM KAM), B1558 (eeprom error), B1982 (Bat Volt High), B1983 (Bat Volt Low).	3
	1989 Chevrolet K2500 Cheyenne 5.7L Hesitation, Cuts out VIN: 1GCFK24K5K we found that it had a week egr diapharm spring allowing to open to soon. replaced egr valve problem solved.	28
	1997 Chevrolet Lumina 3.1L s i r VIN: 2G1WL52M5V Thank you for the replies.George from Ca.was the most helpful with my problem.After plugging and unplugging all connectors to the airbag sysyem the airbag light went out.The things I learned about airbag systems were{1}the selftest can take up to 45 seconds to...	6
	1998 Chevrolet Malibu 3.1L car VIN: 1G1ND52M6W Car has not came back into shop I think that the problem is going to be in the tran. output studshaft on the pass side of tran. thanks for help jason	18
	1999 Chevrolet Blazer 4.3L Poor Idle Quality, Misfire VIN: 1GNCP18W2X thanks for everyones help i've narrowed the problem down to the fuel injector but the customer doesn't want to spend the money so i can't post this as a for sure fix Trouble codes: P0300 (random misfire).	15
	2000 Chevrolet Blazer LS 4.3L Hesitation, Surge, Cuts out VIN: 1GNDT13W1Y We allright then... the beast has been exorcised..I have a lot of guys to thank for the help I recieved and believe me when I say it was appriciated.. I removed the fuel metering assembly and fuel injectors for inspection... All including the pressure regulato...	13
	2001 Chevrolet Express 3500 5.7L turn signals VIN: 1GCHG35R31 hi everybody, i want to thank everybody that sent me help. the final problem ended up being that the front turn signal bulbs have to be a 2357a bulb. most books and shops install the 2057a bulb. we just repaired 6 vans with this same problem. glenn	14
	2001 Chevrolet C3500HD 8.1L fuel gauge VIN: 1GBJC34G11 Thanks all for the help. While testing the gauge and senders and looking for the module ( never found) the scan values were normal and the gauge read empty. the battery went low, we recharged the battery then reconnected the cable . the gauge function properly...	6
	1991 Pontiac Grand Prix STE 3.4L abs pump VIN: 1G2WT54X6M we found that the abs pump was causeing voltage drop which was drawing power from injectors and module making car stall. customer to declined to fix	5
	1997 Pontiac Grand Prix SE 3.8L 1-2 shift VIN: 1G2WJ52K8V Customer decided to replace transmission with Jasper unit. Reman trans fixed shifting problems. Must have been internal problem. Thnkas to all would responded!	3
	1999 Pontiac Grand Am SE 3.4L Left front speed signal A very BIG thanks to all you guys. Most nailed it when they said to check the connector pins. It was tight but i took the connector apart and made fresh connections there. 2 weeks now and all is well. I have another customer who has the same prob on a Alero. I...	17
	2002 Pontiac Grand Am SE 2.2L fuel pump circuit VIN: 1G2NE52F22 I want to thank all you fine people for the help and suggestions.I kept the car in the cool shop overnight and next morning(while things were working) I went through and checked all the fuses for battery voltage. I soon realized that a few of the fuses were sh...	19

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