GM Automotive Technicians Technical Discussion and Fixes for Sep 30, 2005 - iATN (Members Only)

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Open Help Requests for GM

	Help Request	Answers
	1990 Buick LeSabre 3.8L Surge, Cuts out, Stall VIN: 1G4HR51C8L When first started engine will start and then stall two or three times and them will run but has int miss. Spark seems good fuel presure koeo 35psi koer 29psi.Seems like computer related. Mass air flow sensor clean,ect normal Tried another pcm better but still...	View
	1990 Buick Skylark Custom 2.5L Cuts out, Misfire, MIL Lamp on VIN: 1G4NC54U3L car was brought in with check engine lite on, & customer complaint was backfiring through throttle body. mostly after car was warm. visual shows need of wires, plugs, etc. hooked scan tool up to check codes. found codes 15, 25,about all codes were showing. so ...	View
	1995 Buick Park Avenue 3.8L Poor Idle Quality, Hesitation, Stall, Misfire, MIL Lamp on VIN: 1G4CW52K8S This one has me at a dead end and place to go. I am getting a code 623 (1623) Prom Error. What started out with a "sometimes it runs bad with a check engine light" now it sets a code 623 prom error most of the time. Using Mitchell there isn't a whole lot to go... Trouble codes: 623 (Prom Error)	View
	1995 Buick Park Avenue 3.8L security & alarm VIN: 1G4CW52KXS The GM factory installed alarm was set off by the owner when he put the key into the lock. The lock was grounded after the clip and switch fell off of the lock because the lock came to the outside of the door with the key in it. He said the that the horn blew....	View
	1999 Cadillac Seville STS 4.6L rf speed sensor codes c1233 and c1226 VIN: 1G6KY5498X Need some advice, I have this 99 sevile that will set abs codes c1233 and c1226. The problem does not happen consistantly. When it occurs it will only set after an acceleration from a stop, every time. Sometimes the scanner will show 0 for the RF speed and the...	View
	1996 Chevrolet K1500 Cheyenne 5.7L Hesitation VIN: 2GCEK19R9T no engine power at and near wot. engine runs but feels like converters plugged. ease off throttle and engine returns to a power plane and accelerates.replaced fuel pump and filter 1 month ago. cust experienced problem right after pump replacement and no fuel g... Trouble codes: P0300	View
	2003 Chevrolet Suburban 1500 LT 5.3L Driveline VIN: 1GNFK16Z83 Hello, We have this 03 Suburban here that has a cycling noise and vibration at cruise speed(70 mph) The vibration can be felt when it cycles into it's "on cycle" but isn't like a U-joint etc. The seats don't shake, the rest of the floor, etc seem smooth. Thi...	View
	2003 Chevrolet Venture LS 3.4L interior lights I find that when i plug in the amp meter the interior lights are very dim. I have traced all the wires and did not see a short. If i unplug the BCM I don't have any draw however, i do not have enough info to test the BCM. I have not seen a tsb on this proble...	View
	2004 GMC Sierra 2500 HD SLE 6.6L lack of power VIN: 1GTHK29154 Hello all, this vehicle came to us with lack of power it will not go above 60kph, speedometer does not operate, but vss is reading properly. No codes in unit runs well at idle and above idle to 2200rpm then falls on its face. The engine in park will go to 2200...	View
	1993 Oldsmobile 98 Regency Elite 3.8L inop VIN: 1G3CW53L7P abs light comes on every time at 7 mph, sets code 61. abs works below 7 mph. bypass abs pump relay and pump runs. codes for all wheel speed sensors were present at first. we tried used electronic module. we don't have any codes other than 61 now. voltages are ...	View
	1995 Oldsmobile 98 Regency Elite 3.8L starter/ignition VIN: 1G3CX52K9S Hi, this Olds will not crank. It will crank but not start if you jump the starter.It apears to be a vats problem. The security light is on, or will blink while cranking. I tested the key and the conector under the dash, and they have the same reading. They rea...	View
	2000 Other GM COMMODORE VT .0L dash lamps VIN: VT8KV35614 hi every one got a brain teaser here car is a holden commodore v6 3.8 ecotec engine ..symptoms are mil lamp on abs lamp on ,air bag lamp on ,oil lamp on trac c lamp on. i have checked all supplies and grounds (missing one maybe?) trouble codes every were so no...	View
	1992 Pontiac Grand Am SE 2.3L Poor Idle Quality, Hesitation, Cuts out VIN: 1G2NE1433N Thank-you first for being here IATN! I've inhereted our shop's nightmare. We are an indoor recycler of late model BMWs (glorified junkyard), this G.Am is out of our realm. The "boss" bought this unit, great body and interior, and '92 Achieva 2.3 parts car, bot...	View

Fixes & Summaries for GM

	Fix/Summary	Answers
	2003 Chevrolet Avalanche 1500 North Face 5.3L powersteering VIN: 3GNEK13T83 Thank you again group, Its nice to be able to bounce problems off people with experiance from all over the nation. The dealership powersteering pump repaired the vehicle. Its frustrating that even going to a delco reman was not good enough, aftermarket I can...	8
	2003 Chevrolet Express 2500 6.0L Compressor VIN: 1GAGG25U13 Hi, Thank You Thank You for your help! I'm sorry to report that I havn't actually replaced that compressor yet, but I will do it sometime soon. My unfortunate customer had an accident with his van the week I was to fix it so we have to wait till later to do th...	11
	1992 Pontiac Bonneville SE 3.8L No Start VIN: 1G2H521XN1 Thanks for the help, traced all wiring from sensors to computer, had good continuity everywhere, computer was next on the list, customer passed. Thanks again Dave Trouble codes: 42 (est).	4

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