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GMC Safari/Chevy Astro Warning Lights

37 messages,  Last post on Aug 12, 2008 at 4:58 PM

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What is this discussion about? GMC Safari, Chevrolet Astro, GMC Safari Cargo, Van

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#2 of 37 re: 97 SAFARI ENGINE LIGHT by creid Apr 03, 2002 (5:56 am)
I know this is a silly answer but the first thing I would check is the gas cap. The vehicle has a sensor for pressure & will give a check engine light if not tight or leaking. Just my 2 cents.
#3 of 37 Engine light by coonhound Apr 03, 2002 (9:04 am)
If the light does not go off on it's own then you need to lift a battery cable for about 10 minutes to reset the computer. Be careful and don't short + to ground with the wrench as you remove and install a cable. Better to lift negative, but a little more difficult to get to.   My 97 sits a lot and sometimes runs rough on startup giving the check engine light. I reset it and everything is OK.   If it continues to come on you are probably going to the dealer to have them run the code scanner. And hope that someone has not been running premium fuel and the injector pressure regulator is out. The list price of the injector unit is $470.00. The thing is only sold as a unit. My 97 was replaced at 27,000 miles under warranty.   If it is an O2 sensor, and there are three of them at about $70.00 ea. even at auto Zone.   Those are the unpleasant thoughts that I have on the subject.
#4 of 37 93 Astro problems! by wjhumphrie Mar 04, 2003 (8:47 am)
Jkeefe1, Had similar problems, 1993 Safari XLT with 120k had stalling, low power, "Check Engine" light, etc. Had valve seals replaced twice due to smoking at start-up, and EGR continually clogged. Local mechanic, who works on several Safari/Astros did the following: - replaced catalytic, it was bad - replaced O2 sensors, which had been repeatedly nuked due to clogged injectors/EGR valve - did an intake flush, I think it was BTG-system? - removed EGR and ran the van on the road (with the EGR still removed) to blow out residual carbon in the intake manifold - replaced EGR with a new unit.   Since then, I use a bottle of Techron fuel cleaner each month and switched to regular 87 octane. Last 20k miles have been the best running ever for the van! I was ready to heave the beast prior to this last ditch fix, but the improvements are dramatic. Also saw a site on the Van forum for a firm that makes an EGR screen to catch the carbon particles before they enter the EGR assembly, mounts on the base between the intake and EGR itself. There's also a PROM update that the dealer has that cycles the EGR open at cruise, probably to allow carbon to blow out? Good luck!
#5 of 37 AWD Mileage Update by creid Mar 22, 2003 (2:53 pm)
I asked earlier to AWD owners of their gas mileage compared to mine. Well I took my van to the dealer yesterday due to an intermittent check engine light that illuminated when holding the coast in w/ cruise control set. The code was about the right and left banks running rich. The dealer replaced the MAP sensor due to the original was shorted (according to tech writing on service report). My question does a map sensor make that much of a difference with regards to gas mileage?
#6 of 37 MAP sensor by mrnimmo Mar 23, 2003 (6:54 pm)
could certainly make it run rich enough to give you that horrible gas mileage. Time will tell, right?
#7 of 37 Loosing my mind 1994 Safari by braedhead79 Aug 16, 2005 (1:40 pm)
Ok so I bought this 1994 Safari from my aunt it drove fine for a couple of weeks then I filled it up drove it about 60 miles and when I got of of the interstate it was running like Either the head gasket was blown or it had water in the gas (it even deiseled When I turned it off) so I went to a gas station bought some gas treatment and the problem went away almost instantly. so I thought the problem was solved then I drove it home then to and from work for 2 weeks no problem then I had a 3 hour drive to make so I stopped at a different gas station filled up and about 20 minutes down the road it did it again( both time the Service light came on) so I stopped got gas treatment and problem gone Thought it was odd that 2 different gas stations had water in thier gas but with gas prices the way they are its possible but then on the way back from my 3 hour drive it did it again this time without filling up but I let it sit before working on it and the service light is off and its running great so I don't even know where to start because everything is working now Any Ideas would be greatly appreciated Thanks Replies to this message: stonebusi (Aug 19, 2005 7:05 pm) disastro (Nov 07, 2005 11:41 pm) billb4 (Nov 08, 2005 6:36 pm) and 1 more...
#8 of 37 Re: Loosing my mind 1994 Safari [braedhead79] by stonebusi Aug 19, 2005 (7:05 pm)
Replying to: braedhead79 (Aug 16, 2005 1:40 pm) This problem sounds a lot like dirty, clogged or malfunctioning fuel injectors. The reason the fuel additive works for a while (if I'm right) is because it temporarily cleans the injectors. I've never had this problem with my Astro, but have experienced it multiple times in other vehicles. The "Service Engine" light would come on because you're giving the computer a misfire fault. I don't know how big a deal it is to remove the injectors, but if it's tough you might first check plugs and wires. Replies to this message: disastro (Nov 07, 2005 11:41 pm) billb4 (Nov 08, 2005 6:36 pm) dave8697 (Nov 09, 2005 1:23 pm)
#9 of 37 Re: Loosing my mind 1994 Safari [stonebusi] by disastro Nov 07, 2005 (11:41 pm)
Replying to: stonebusi (Aug 19, 2005 7:05 pm) I see that it was august when u had this problem did u get it fixed. because i have a 96 chevy astro i have replaced the fuel pump and fuel filter and it still won't run any suggestions would be appriciated. thanks Replies to this message: billb4 (Nov 08, 2005 6:36 pm) dave8697 (Nov 09, 2005 1:23 pm)
#10 of 37 Re: Loosing my mind 1994 Safari [disastro] by billb4 Nov 08, 2005 (6:36 pm)
Replying to: disastro (Nov 07, 2005 11:41 pm) Spray starting fluid into intake hose behind the air cleaner in front of the engine. Now if you get no attempt at starting like it wont try to fire then you have no spark or ignition. Now it could be the module that controls the ignition and this will take out the ignition coil both could be hosed. My 99 Safari is in the dealers shop as we speak and this is what they told me, all for only $450.00.I'm lucky I can afford it, but I hate to pay someone when I can fix it myself, but I couldn't. So maybe this will help you or someone else. Good Luck BillB4 Replies to this message: dave8697 (Nov 09, 2005 1:23 pm)

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