GM Automotive Technicians Technical Discussion and Fixes for Nov 17, 2005

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	Help Request	Answers
	1996 Buick Regal Custom 3.8L Misfire, MIL Lamp on VIN: 2G4WB52K6T Hello fellow GM techs. I have this car that came into my shop yesterday with the SES and miss. Scan test found random misfire on #5 cylinder. Tested firng and does miss on #5. Test injectors with both amp tester and balance tested injectors-good, tested spark ... Trouble codes: P0300	View
	1999 Buick Park Avenue 3.8L Unknown VIN: 1G4CW5ZK4X Hello all, Working on this Buick with dual zone control. It is now cold out here in Indiana and our customer is concerned about his climate control system. He was also in over the summer with a concern about the system just not maintaining the proper temp and ...	View
	2002 Buick Park Avenue 3.8L MIL Lamp on VIN: 1G4CW54K22 P0137 and P440 set vary rarely.( 3 times in 14,000m) Replacement fuel cap seems to stop P0440 from re-occuring. P0137 sets usually after 2-4 hours of highway speed running. It will set at 85mph or 62 mph randomly. Code set will clear out after 1 week of in tow... Trouble codes: P0137 (O2 sensor low bank 1 sensor 2), P0440 (Evap Emission Fault)	View
	2002 Buick Park Avenue Ultra 3.8L transmission VIN: 1G4CU54182 Hissing type noise on acceleration, only in gear, at 2000 rpm and up. Can duplicate noise in service bay by Power braking vehicle. Will make noise in reverse or drive. Almost sounds like exhaust noise. We smoke tested exhaust system and found no exhaust leak(s...	View
	2002 Buick Rendezvous CX 3.4L thermostat VIN: 3G5DA03E02 I've got a rendezvous with a problem, if you'll pardon the pun! I'm sure someone out there knows the best way to replace a thermostat on this 3.4l. We're doing a maintenance cooling system flush, remove t'stat, flush with compressed air and water, then install...	View
	1999 Cadillac DeVille 4.6L steeriing wheel VIN: 1G6KD54Y2X hello again we have this cadillac that has a shake in the steering wheel only when you turn to the right we replaced both inner and outer tie rod ens on both sides and both cv axles we checked the motor mounts we removed the serpentine belt so the power steeri...	View
	1994 Chevrolet K1500 Suburban Silverado 5.7L Hesitation, Cuts out VIN: 1GNFK16K9R hi techs. this problem started a month ago and is getting worse. you can ease away from a stop no problem, but anything above half throttle and it falls on its face. back out of the throttle and it comes right back. this happens at any speed. if you keep the t...	View
	1997 Chevrolet Cavalier 2.2L run's hot VIN: 1G1JC5243V the problem is this car is running hoter then normal, fans will kick in at about 225f 3/4 of the gage range, the circuit seems to be in good shape because if i disconect the e.c.t fans will kick in right away, its like the computer does'nt have the correct cal...	View
	1997 Chevrolet Blazer 4.3L Hesitation, Surge, MIL Lamp on VIN: 1GNDT13W1V The customer brought this vehicle in complaining of lack of power and surging with MIL on. Before test drive scanned code and found P0101 (a mass air flow code). During test drive found surge, hanging in gear unless lifting off accelerator. Unable to accelerat... Trouble codes: P0101, P1406	View
	1999 Chevrolet S10 LS 4.3L fuel gauge VIN: 1GCCT19W5X Fuel Gauge intermittently reads correctly than drops to empty. Monitored Fuel level never changes and is correct. Displayed Fuel Level follows gauge.	View
	2000 Chevrolet Blazer LS 4.3L No Start VIN: 1GNDT13W9Y New poster here,hope I,m following the rules. This s10 has blown these fuses twice,20amp,o2 heater circuit and the 15 amp ecm1,leaving customer stranded both times. We ran resistance and voltage checks on the o2s and they were within specs.Cold start,amp draw... Trouble codes: 135 (o2 sensor heater circuitbank1 sensor 1), 147 (o2 sensor heater circuit bank1sensor 3), 155 (o2 sensor heater circuitbank2sensor1)	View
	2000 Chevrolet Cavalier 2.2L No Start VIN: 1G1JC1241Y Vehicle died when going down the road. Checked for codes [...] p0336 were found. Check pattern with lab scope on both sensers found ok. Check 7x signal found hash on bottom line also random signals only making it to 2.5 volts should be 5v. Replaced crank an... Trouble codes: P0336, P0340	View
	2001 Chevrolet Malibu 3.1L ipc VIN: 1G1ND52J41 I can not make the temp gauge work for the engine. I looked at alldata schematic and coolant sensor/switch is the same. I replaced IPC with know good IPC no change.On scanner coolant temp is normal for for colant temp senor for computer but gauge in dash does ...	View
	2002 Chevrolet Malibu 3.1L Starting system VIN: 1G1ND52J82 This car has no start condition, it happens every week or two. The problem has not happen in the shop. It has no trouble codes. The customer says she leaves it set for 10 minutes and it starts right up. She has tryed a different key and it still will not start...	View
	2002 Chevrolet Impala LS 3.8L Extended cranking VIN: 2G1WH55K72 Hi Group, I have this Impala with customer complaint of intermittent extended crank. Before I even had the car in the shop , I figured fuel presure regulator. Well I've checked till I'm blue in the face. I've never seen any fuel and pressure doesn't bleed off ...	View
	2006 Chevrolet Silverado 2500 HD LT 6.6L No Start VIN: 1GCHK23DX6 A customer just bought this truck and filled it up with GAS instead of diesal. It ran for 5 miles and died. We drained the system and refilled it with diesal. It runs good, but, will there be any problems in the future (long or short term) from this mistake. ...	View
	1989 GMC K1500 Sierra SLE 5.7L master cylinder? VIN: 1GTDK14K1K Hello all, Got a simple one driving me crazy! This older farm truck came to me in need of a complete brake job so replaced all worn and old parts. I have been to the archives and found several posts talking about rwal accumulator,masater cylinder,etc. Have cov...	View
	1988 Oldsmobile Cutlass Ciera SL 3.8L engine VIN: 2G3AM1138J This car has a very prominante vibration at 12-1500 rpm,it smooths out as rpm increases. At first glance could have swore it was grounded engine mount but somebody has already replaced all of them(probably to fix this problem). Scope tested ign. and checked em...	View
	1998 Oldsmobile Cutlass 3.1L No Start I have tested the crank sensor for the 2.0 a/c volts ok replace bcm moudle and reprogramed key and pcm hade codes in history on bcm perfomed pinpoint test for bcm and the flow chart sent me to the bcm still no start .. ck injector pulse ok get injector pulse i...	View
	1999 Oldsmobile Intrigue GX 3.5L Charging VIN: 1G3WH52H3X This car came in on the hook with a dead battery and no charging output after a 4 hour charge. we replaced the battery and the alternator which is a hell of a design, and the system is charging at 14.2- 14.6 volts and 15-20 amps at idle. We think all is well b...	View
	2000 Oldsmobile Silhouette GLS 3.4L Wipers do not park VIN: 1GHDX03E3Y HELP!!! I have been fortunate to avoid this wiper system until this point:) This vehicle came in with the center scr ew out of the cam mechanism. The motor was running fine. Customer did say that the wipers where not parking correcty for about three months pri...	View
	1999 Pontiac Bonneville SE 3.8L Hesitation, Cuts out VIN: 1G2HX52K7X Ok this is a tough one. This car belongs to one of my co workers. We have been trying to figure this thing out for 6 months or so. What happens is that when you slow to make a left hand turn and then slowly accelerate the car falls flat on its face. You can le...	View
	2000 Pontiac Bonneville SE 3.8L air shocks VIN: 1G2HY54K31 rear air shocks literally freeze up in cold weather from water inside them. this car has an externally mounted air compressor that fills the shocks. one year ago we replaced the inlet filter and the shocks with oe ones and now its doing the same thing again. a...	View
	2000 Pontiac Grand Prix GT 3.8L no power VIN: 1G2WP52K6Y OK Guys here is a goody. Customer called us that her car died while it was idling. Tech walked up to where the vehicle was and turned the key and it started. Customer states that it was idling and just quit. She attempted to restart several times but the dash ...	View
	2002 Pontiac Grand Prix SE 3.1L Heater Box VIN: 1G2WK52J82 Water in pass. floor, heater box is filling with water from the cowl under the wipers. Could not find a pluggged drain, it looks like it was designed to do this? I know Iam missing something but what. Thanks Mike	View

Fixes & Summaries for GM

	Fix/Summary	Answers
	1996 Cadillac DeVille 4.6L 2nd gear starts VIN: 1G6KD52Y9T First, let me thank all who replied. Most pointed toward the common problem concerning the solenoids & retainer. The problem ended up being the wrong gasket between the channel plate and the sprocket support. There are two different styles and the builder miss...	4
	1994 Chevrolet K2500 Cheyenne 6.5L Cuts out VIN: 1GCEK29S5R installed remote drive on intake. works good. unable to obtain any testing specs. brian suggested lab scope to pcm to check operation. however, without a good driver, we had to wait until that was replaced first. thanks again.	7
	1996 Chevrolet Tahoe LS 5.7L Misfire, MIL Lamp on VIN: 1GNEK13RXT Thank you, gentleman and ladies for your assistance with this vehicle. The injector upgrade that was suggested did the trick wonderfully. I still never figured out what was actually causing the poppet to plug, but as long as it keeps running well I'm happy. I ... Trouble codes: P0300.	7
	2000 Chevrolet Tracker 1.6L MIL Lamp on VIN: 2CNBJ1860Y Hello again Gents,I'm afraid my customer did not want to get deeper into repairs of this Tracker.He has come by shop to say the mil is out and can't reason why he should spend money.There is a classic case of system failing and passing the on board diagnostic.... Trouble codes: P0400 (egr flow error).	5
	2002 Chevrolet Silverado 1500 5.3L Misfire VIN: 2GCEK19T02 I'm posting this fix cause I know it's the intake gasket. Tried propane too windy but, carb cleaner put in the right direction when the exaust fumes out the tail pipe blew me over. intake gasket on the way to my shop. thank you Lon, Brandon, Darren, alwin, Lay...	9
	2003 Chevrolet Suburban 1500 LT 5.3L MIL Lamp on VIN: 1GNFK16Z63 Thanks for the help Fuel pump pressure was fine. We checked it earlier after checking the previous fixes. We did not see a reason to replace it. We checked the wire on the MAF for junk, but it was clean. O2s were moving quickly, fuel pressue was good. There wa... Trouble codes: P0171, P0174.	5
	2003 Chevrolet Silverado 1500 5.3L Stall VIN: 1GCEC14T93 well thanks for all that responed to my post sorry i'm slow to post fix. had to replace throttle body assy to make truck go away iac is inside throttle body assy. Thanks to all.	8
	1995 GMC Safari 4.3L Poor Idle Quality, Surge, Stall VIN: 1GTDM19W5S First off THANK YOU to all who replied so promptly ! My technician verified fuel pressure, checked & verified egr operation, t-body & egr passages were cleaned at injector installation. Technician TAP tested ECM & bingo we have a winner. Replaced ECM & off to ...	14
	1998 Oldsmobile Aurora 4.0L MIL Lamp on VIN: 1G3GR62C7W Thanks for all the advice. was not able to establish communication with this vehicle customer just wanted to fix cheak engine light which turned out to be a misfire due to poor wire condition OEM.	7
	2002 Oldsmobile Alero GX 2.2L Passlock VIN: 1G3NK12FX2 Thank you for your responses. My mistake was to assume that the previous replacement of the ignition cylinder and pass module were done correctly. When I removed the unit, I found the pass module broken at the connector and the pins bent. Replacing the unit to...	6
	1996 Pontiac Grand Am SE 3.1L Hesitation, no power Hi everybody, Thanks alot to everyone who helped out. The first thing we allways say after we've gotten stuck on something is: Back to basics. I had tested for fuel pressure and volume right from the get go but the problem was still a blocked fuel filter. The ...	30
	2001 Pontiac Aztek 3.4L Anti-Theft VIN: 3G7DA03E21 This vehicle is fixed. With special thanks to Glen from Ontario, Dave from Indiana and John from New Jersey who told us what we didn't want to hear, we re-replaced the BCM and reprogrammed it using and RPO list (which is the list of options for this vehicle)we...	5

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