suburban problems

[ray]

have a 1999 4x4 suburban.
it has begun to stall with no warning, had main board,fuel pump,and crank shaft sensor replaced and still have same issue.
Little help please!

[matt]

just did all myself,few wreckers later new pump and wire at pump all fine now

[ray]

matt wrote:

just did all myself,few wreckers later new pump and wire at pump all fine now

Thanks for the heads up.

[ray]

found issue. diconnected the security system, and it has not died since

[Hal Helmboldt]

ray wrote:

have a 1999 4x4 suburban.
it has begun to stall with no warning, had main board,fuel pump,and crank shaft sensor replaced and still have same issue.
Little help please!

Hello:
You're lucky. I just happened to be looking ofr a used suburban and came across your post. My family (and I) have owned suburban's for the last 30 years, including a new one in 2004.
We had the same problem with two suburban's. I can almost GAURANTEE that your problem is the Upper Throttle Body Assembly on the intake carb. It will not show up on diagnostics. It developes this "thing" that causes it to stall or hesitate, or hesitate and then stall. It is aggrivating because no one had a clue what was causing it. We even had a mechanic take our suburban home for a week! Still, he could not figure it out... until, he called us and said... Hmmmmm, I wonder??? So, he changed what he called, the Upper Throttle Body Assembly (which might mean different things to different mechanics), and that fixed the problem. This happened to two of them that we owned.
Someone in California had the same problem in 2000. I saw his post, too. I wrote to him to tell him. He wrote back two weeks later to tell me thank you... that was the problem.
Good Luck!

[chris spruill]

I have a 1999 chevy suburban that has failed to start on four occasions during the last year after a rain. Each time it turned over and just dies after I disengaged the ignition. After letting it sit for 15-30 minutes it started each time and ran well. Each time we had spark and fuel. It only has done this after a rain.

[tom f]

l994 suburban battery will not hold charge I repalaced the battery, I had the alternator bench tested, I had the alternator tested in the suburban. they can't find anything wrong. With a full charge, if you drive it during the day it may not start iin the evening. any solutions or suggestions thanks tom f

[REG]

chris spruill wrote:

I have a 1999 chevy suburban that has failed to start on four occasions during the last year after a rain. Each time it turned over and just dies after I disengaged the ignition. After letting it sit for 15-30 minutes it started each time and ran well. Each time we had spark and fuel. It only has done this after a rain.

I Have been having the same problem especially when I stay over night at a higher altitude exept I have to wait two hours until it will start, then it runs great until I go back into the mountains again. It is very frustrating, and has been happending ever since I bought it new 7 years ago. I wish someone had the answer, because gm certainly does not.

Thanks

[LRon]

tom f wrote:

l994 suburban battery will not hold charge I repalaced the battery, I had the alternator bench tested, I had the alternator tested in the suburban. they can't find anything wrong. With a full charge, if you drive it during the day it may not start iin the evening. any solutions or suggestions thanks tom f

Something must be drawing current. To find the problem, turn everything off and then hook up a meter to your battery to show current flow. Confirm that current is flowing when it should not be. Start pulling fuses until you find the circuit that's drawing power.

Or take the vehicle to a shop that specializes in auto electrical problems.

[Dave]

No start complaints...

You have to change the fuel pump at about 75K miles as they get weak and ultimately leave you stranded.

Part of the cause is inadequate service of the filters. New filter every 1000 gallons or about 15K miles.

If it won't start you can whack the fuel tank with a 2x4 or something else to try and jar the pump commutator.

I once whacked a Honda like that and really amazed the onlookers.

[Dave]

LRon: There is a well known problem with side terminal batteries, in that they crack at the & terminal and leak acid into the cables and terminals. Mine wicked acid ten feet to the fuse and relay center. If it has leaked before, you must change the cables, as the acid in the cable feeds back onto the lugs no matter how well you clean them. I converted to top terminals with military connections.

[LRon]

Dave, OK, so then the battery won't show any current flow.

[SickSuburban]

matt wrote:

just did all myself,few wreckers later new pump and wire at pump all fine now

Matt, I think I have the same problem. Exactly what was your truck doing and what wire did you replace?

[Pigman]

I have a 99 Suburban and going down a hiway it just died after a small bump. Lost everything. Electrical power seems okay as I have full battery power. It cranks over but that is it. Nothing like being 300 miles from home on a family vacation. I think fuel pump might be it but not sure. No one in this state works on Saturday or Sunday.

[Dave B]

Fuel pump is suspecy. Try whacking the tank with a 2 x 4 or rubber mallet to move the pump commutator and start it again. Fully fauled, it's tow truck time.

They only last ~ 80K miles, and they last longer if you keep the filter changed every 1000 gallons and never draw the tank lower than 1/4 full.

[Pigman]

Turns out ECM1 fuse is blown and keeps blowing with everything pulled off and turn key, it blows. Short somewhere.

[Jerry Hibbert]

Hal Helmboldt wrote:

<quoted text>
Hello:
You're lucky. I just happened to be looking ofr a used suburban and came across your post. My family (and I) have owned suburban's for the last 30 years, including a new one in 2004.
We had the same problem with two suburban's. I can almost GAURANTEE that your problem is the Upper Throttle Body Assembly on the intake carb. It will not show up on diagnostics. It developes this "thing" that causes it to stall or hesitate, or hesitate and then stall. It is aggrivating because no one had a clue what was causing it. We even had a mechanic take our suburban home for a week! Still, he could not figure it out... until, he called us and said... Hmmmmm, I wonder??? So, he changed what he called, the Upper Throttle Body Assembly (which might mean different things to different mechanics), and that fixed the problem. This happened to two of them that we owned.
Someone in California had the same problem in 2000. I saw his post, too. I wrote to him to tell him. He wrote back two weeks later to tell me thank you... that was the problem.
Good Luck!

Hi there! I am having a nightmare with my 2001 as it does exctly this. Sometimes it just dies and won't start again for maybe a few hours - maybe days - then it fixes itself, and it's fine for a bit. It's driving me nuts. Everytime I take it to the garage the diagnostics can't find a fault.
I'm going to try the Upper Body Throttle Assembly. Thanks..... Jerry

[Mary]

My wipers won't work. I turned them on in the morning then turned them off. Then I went to turn them on as it was raining and they wouldn't turn on. I kept trying to turn them on then finally about 20 minutes later they started working. The fuss is okay. Does anyone have an idea what could be causing this problem? It's a 98 Chevy SUV. Do I need to put this into the shop or could I fix it myself? Could it be a defective wiper motor, or even a faulty switch?

[LRon]

I think this is a fairly common problem with that model vehicle. I would bet that when the wiper doesn't work, you can open the hood and rap on the wiper motor, it will immediately start working. Doing that in the rain is pretty much a pain, though.

[JosephMac]

I have a 1997 suburban and my front end is acting like it is in four wheel drive although my transfer case is not ingaged. If you have any suggestions I would appreciate them. Thanks.