GM Automotive Technicians Technical Discussion and Fixes for Feb 13, 2004 - iATN (Members Only)

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Open Help Requests for GM

	Help Request	Answers
	1988 Buick Reatta 3.8L Side Housing for seat switches VIN: 1G4EC11C6J Found a bad lumbar seat switch but when I changed it the plastic housing broke. Tried dealer but part discontinued. Wonder if anyone knows where to find one. The housing is mounted to the side if the drivers seat. It has three switches. They are thigh,recline ...	View
	1994 Cadillac DeVille 4.9L dash display climate control VIN: 1G6KD52B1R then we were about to install an alarm system prestige model # aps-996a with remote start and page we hooked up 2 constant + wires under dash from steering ,then we took out headlight switch and checked some wires for park light hot wire with a test light alon...	View
	2001 Cadillac DeVille DHS 4.6L heated seat VIN: 1G6KE57Y81 Hello all, This car has been in for about 20 problems in the last 2 months. This is just another I can't seem to find. Drivers heated seat bottom and back not working most of time. I only have an OTC Genisys and am not able to perform diagnostics as recommende...	View
	1992 Chevrolet Astro 4.3L Excessive Emissions, Hesitation, Surge VIN: Z5NB114107 Hello gents I have a astro thats been a bother, this vehicle will idle fine. If you put engine under load it will boug down but not stall. I intally thought i had a plugged converter so i removed o2 sensor and redrove vehicle it seemed to help but it didnt fi...	View
	1993 Chevrolet K3500 Silverado 6.5L coolant VIN: 1GCHK39F1P I need your input on a clean 6.5 k3500 with constant bubbles appearing in the coolant reservoir. I have replaced the cylinder heads with new ones,finding bad gaskets and cracked heads. At idle constant bubbles leave radiator, which is new as well as the cap. I...	View
	1996 Chevrolet Corsica 2.2L pings VIN: 1G1LD5543T car came in with #3 misfire code & coolant in #3 cylinder- with injector unhooked, would pressurize cooling system after running for 5 seconds- removed cylinder head and gasket had blown out between fire ring and small coolant passage- removed gasket was a fre...	View
	1996 Chevrolet S10 2.2L 1-2 shit, and 4th VIN: 1GCCS1446T it was a tow in on a monday morning. apparently it wasn't shifting right. Customer said the check engine light was on but not at this time when checked out. checked for codes and service writer didn't put it on the invoice and can't remember it!!! I do remembe...	View
	1999 Chevrolet Express 1500 4.3L Speedometer VIN: IGCFG15W2X hello, I've got a 99 express van that is intermittently showing 80km on the speedometer when the vehicle is at rest. The reading is also jumpy when you're accelerating or decelerating. The signal from the VSS seems fine and there has been no wiring trouble fo...	View
	1998 Geo metro LSI 1.3L No Start, Misfire Geo was brought to shop with a hard start when cold. Injector pulse good on #1, no pulse or eratic on the rest. Good Spark. Spray chem tool starts good and runs.Checked timing marks ,on the money. Checked all grounds to computor and related wiring. Ended up be...	View
	1996 GMC K1500 Suburban 5.7L Misfire, MIL Lamp on VIN: 1GKFK16R6T Friends, this is a real hair-puller. The truck came in with a misfire code and freeze frame data for #5 misfire. it is bad enough that the MIL will flash at idle. off idle the counter will go down to 0 while driving, as soon as you come back to idle, it will s... Trouble codes: P0300 (random cylinder misfire freeze frame indicated 5)	View
	1999 GMC K1500 Suburban SLE 5.7L MIL Lamp on VIN: 1GKFK16R6X I just need to know the location of Bank 1 -Sensor 2. Called dealers and no one can or will tell me Trouble codes: P0141 (O2 sensorheater malfunction Bank 1-Sensor 2)	View
	2000 GMC Sierra 1500 SL 5.3L hard start when hot VIN: 1GCEK14W91 after a hot soak this truck has an extended crank time so long crank i am woried about the starter. fuel pressure is 58 psi running or koeo. I am not to techinical so I could sure ise some help on this. Thanks Dave	View
	1993 Pontiac Bonneville SE 3.8L starts in second or third gear VIN: 1G2HX53LP1 I have 93 Bonneville in my shop, customer want it replace his trans with good used one because it takes about 10 minutes for the engine to warm up before you can drive it any where. I installed used transmission from another Bonneville (95) with 33k on it. Car...	View
	1997 Pontiac Grand Am SE 2.4L Poor Idle Quality VIN: 1G2NE12T7V HELP! This veh has a rough idle with miss fires and a rich exhaust. Off idle the veh runs fine. We have replaced coils, coil tower with boots, plugs, map sensor, check fuel pressure, did a oil pressure test due to tsb every thing was ok. o2 sensor was switchin... Trouble codes: P0300	View
	1997 Pontiac Trans Sport 3.4L keyless entry VIN: 1GMDX06E6V Hello all. This van is giving me some grief. The keyless entry will not work. I have checked all voltages and grnds at the bcm and is all ok. At the receiver i have main power thru radio fuse and a good grnd. I have power for power sliding door but should i ha...	View

Fixes & Summaries for GM

	Fix/Summary	Answers
	1994 Buick LeSabre Custom 3.8L spark Knock VIN: 1G4HR5215R Thanks for all the replys, most made references to combustion deposits, one mentioned potential lean condition, which is what thought or EGR stating it was working( as per Scanner) but not really allowing egr flow. It turned out it was a lean condition, The RO...	10
	1994 Cadillac Seville SLS 4.6L Mechanical VIN: 1G6KS52YOR Rec'd a mixed bag of replies on this, with no solid answers.Most had mentioned blow-by and/or PCV malfuntion, which was checked prior.One had mentioned an aftermarket oil bath air filter with too much oil.Had not thought about that. But this had the stock filt...	6
	1998 Cadillac Seville STS 4.6L Starting VIN: 1G6KY5492W Thanks to all that replied. Once again we overlooked the basics. Battery that tech said checked OK had insufficient charge.Fully recharged original battery and refitted to car, starts and runs normally. Sorry to take up your time and niggled by wasting so much...	6
	1994 Chevrolet Corsica 3.1L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire VIN: 1G1LD55M7R We had a hard time resolving this one.We were able to verify no injector pulse on 4 cyl when cold intermitly.We had replaced the pcm and ignition module previously but still had concerned.We were lucky to get a real hard colsd spell which let us reproduce conc...	10
	1995 Chevrolet C1500 Cheyenne 5.7L 1-2 shift, no OD VIN: 1GCEC19K4S Had 5 replies, all said to go to the ignition switch. Replaced the switch and boom, all my problems were gone. We had full dash function, and all 4 tranny shifts were there. Thanks for all the great timely replies	5
	1999 Chevrolet Tracker 1.6L 4x4 air actuator pump VIN: 2CNBJ13C7X well thanks to all who replied the fix was to replace the indicator switch on top of transfer case (which was missing the pea sized checkball below it thanks to a transmission shop) but even after fixing that the compressor would only produce 3 psi not the 6 t...	3
	1999 Chevrolet Cavalier 2.2L speedometer VIN: 1G1JC1241X Hello friends this vehicle could not be fixed, and must be sent to dealer for diagnosis,we replaced electronic cluster and ended up with the same problem, speedometer not working.And no, we did not failed to install both connectors on cluster as the gentleman ...	1
	1993 GMC K3500 Sierra SLE 7.4L defroster door VIN: 1GTHK39N7P Hi Everyone and thanks for the help. I learned that if it was necessary to get clear to the top of the heater box or to remove the heater box that I would have to lower the steering column and pull the dash. However, I found that the part I needed to access wa...	3
	1998 Oldsmobile Silhouette Premiere 3.4L abs/traction control VIN: 1GHDX03E2W thanks to all who replied, and Phil form new hamppshire for his detailed info. Here goes: based on what Phil advised for checking for rear brake action with the motor pack off: 'The next thing has you remove the motor pack from the valves and turn the rear...	4
	2000 Pontiac Bonneville SE 3.8L Radio VIN: 1G2HY543KX I replaced the radio and car has not acted up thanks Jim	5

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