GM Automotive Technicians Technical Discussion and Fixes for Mar 23, 2007 - iATN (Members Only)

×

Join Now

Prev	Professional Automotive Repair Technical Discussions for March 23, 2007 International Automotive Technicians' Network (iATN) - Members Only	Next
(Also Available: All, Asian, Chrysler, European, Ford, GM.)
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Open Help Requests for GM

	Help Request	Answers
	1998 Buick LeSabre Custom 3.8L Poor Idle Quality, MIL Lamp on VIN: 1G4HP52K7W This car is always idle high about 1200 rpm in park and 875rpm in gear. Coolent temp and tps ranges are operating normal. It has code po507B. It also pass the smoke machine leak test when testing through the brake booster line. When removing the IAC valve, the... Trouble codes: P0507	View
	1994 Cadillac Eldorado 4.6L tick in front cylinder head? VIN: 1G6EL12YXR Hello all. This is my car. Has tick noise in FRONT cylinder head ONLY. Sounds like lifter tap. Pulled front valve cover. Extremely clean engine- absolutely no sign of sludge. FOUND ALL EXHAUST LIFTERS CAN BE COLLAPSED W/ FINGER PRESSURE APPLIED; HOWEVER all in...	View
	1998 Cadillac Seville SLS 4.6L oil pan VIN: 1G6KS54YXW ok cadilac techs is there an easier way to reseal this oil pan than removing the transmission we have a trans jack but it is kindof weak dont know if will support the wieght of this giant trans	View
	1989 Chevrolet Camaro RS 5.0L Poor Idle Quality VIN: IGIFP21F1K Hi, I have this car that have a high idle when you come to a stop.You can hit the throttle and it will come down to spec.I put a IAC motor,a ECM & TPS and I still have high idle. I need some help.Thinks	View
	2000 Chevrolet Astro 4.3L Poor Idle Quality intermittent high idle. see repair history Trouble codes: P1509	View
	2003 Chevrolet Express 3500 6.0L MIL Lamp on VIN: 1GCHG39U03 vehicle keeps throughing p0357 dtc!!! alldata shows wiring harness to be ok!!! we have replaced ignition coils twice and ecm twice!!! obviously we are missing something or not getting the right information for diagnostics!!! any help will be greatly appreciate... Trouble codes: P0357 (ignition coil g primary circuit problem)	View
	1994 GMC K1500 Sierra SL 5.7L Cab of truck VIN: 1GTEK14K4R Customer states that the cab of the truck turns in to a sauna and steams up driving down the road. First visit we pressure tested & found only a minor weep @ the waterpump. We added coolant leak detector dye and had him come back in 2 weeks (today). The coolan...	View
	2000 GMC Savana 1500 5.7L belt VIN: 1GDFG15RXV replaced belt three times with different brands and last one shorter. replaced tensioner twice with diferent brands. still have belt squealing with engine reved up. when i put new belts on, noise on first run. let sit for bout an hour noise is back.	View
	2000 Oldsmobile Intrigue GLS 3.5L oil consumption VIN: 1G3WX52H1Y since valve cover replacement, car has started to use alot of oil. 5 qts in 2 weeks	View
	2002 Oldsmobile Alero GLS 3.4L cluster/radio VIN: 1G3NF52E82 This is a 2002 alero that intermittently looses the instrument cluster and the radio. When this happens if the key is then turned to the off position the radio comes back on. I have not duplicated this condition, but have found two history codes: b1379 and p15...	View
	2001 Pontiac Sunfire GT 2.4L odometer VIN: 1G2JD12T11 this car is a repo, it was brought to me because there is no odometer. if you shine a flashlite at were the odometer is you can read it barely. it just does not lite up?? does anyone know what my next step is. every thing works ok except this??? i was able to ...	View
	2001 Saturn L200 2.2L stft/ltftrim;subtrac VIN: 1G8JU52F51 Hi gang,this L200 came-in running poorly,checked codes=see below,monitored long term ful trim + stftrim,found numbers around mins10% stft@idle,,[...]@ idle...When Cruising numbers got worse,,,-25-stft,,minus-22ltft.. Also was popping thru intake,so i ck'... Trouble codes: P0300, P1599, P0105	View

Fixes & Summaries for GM

	Fix/Summary	Answers
	1994 Buick Roadmaster Limited 5.7L Dash lights VIN: 1G4BT52PXR Explained to customer that this was a normal condition... had to Illustrate extensively to alleviate questions... Thanks for all of your Help! Duane	10
	1994 Cadillac DeVille 4.9L Poor Idle Quality VIN: 1G6KD52B3R Haven't had vehicle back in order to correct problem, but feel with info given, we'll get it corrected, thanks for all the great input-where we were going wrong is not manually pushing in the stepper motor. thanks again, Brian.	20
	1986 Chevrolet K20 Scottsdale 5.7L fuel gage VIN: 1GCGK24M5G Sorry all, customer came and picked up the truck. Said he would live with the problem.	16
	1987 Chevrolet V10 Suburban Scottsdale 5.7L MIL Lamp on VIN: 1GNEV16K7H Hello all, It was the ESC control module. Its an older system from before my time so I didnt know how it worked without consulting the manual and the manual was bad. Here is how the system works. The knock sensor is a pieczio-electric signal generator. I... Trouble codes: 43 (Electronic spark timing circuit.).	17
	1991 Chevrolet C1500 Cheyenne 4.3L Engine VIN: 2GCEC192Z0 Got the truck put back together with a plug in the rear hole on the passenger side of the block, and now all the lifters are quiet as can be. Both sides of the engine are getting the same amount of oil to the top end as well. Hope this helps someone out in t...	1
	1994 Chevrolet K1500 Suburban Silverado 5.7L Poor Idle Quality VIN: 1GNFK16K4R Hello all - Rechecked & found iac was the problem. Replaced with new & reset, works great. Thanks!	13
	1996 Chevrolet Tahoe LS 5.7L Misfire VIN: 1GNEK13R7T Thanks for all the help! The problem was three differnt things. first, (and we should have known this, because we have run into it before) was the dist. cap. we had done a injector drop test, and found that # 7 and #3 injectors were weak, thats when we stopped...	20
	2003 Chevrolet WORKHORSE 6.5L No Start VIN: 5B4HP42Y43 problem solved put this in your memory bank. never trust a test light, due we have power and ground at the fuel shutdown solonide enought to light that test light both on run and crank but when a headlight bulb is substituted on crank there was a glow. back tr...	4
	2005 Pontiac Grand Prix 3.8L Hesitation, Surge VIN: 2G2WP522X5 found that when the condition occured it was very int and that the egr valve could be commnaded off and no effect was felt still had hesitation but if key cycled that fault went away. we checked all vehicle grounds and found g102 located near the battery tray ...	7

(Also Available: All, Asian, Chrysler, European, Ford, GM.)