HELP!!! on 99 suburban
 

Ok guys, I'm in a bind. My Suburban crapped out on me Sunday morning in Defuniak Springs, Florida. I'm 650 miles from home and I had to have the truck and boat towed. I rented a car to get home and I need to figure out what happened to the Suburban so I can get all my chit back home.
Here's what I found:
ECM-1 fuse was blown. Owners manual say, injectors ECM/VCM.
I unplugged the ECM, fuel pump and the fuel pump relay and it still blows the fuse when you turn the key on.
I'm lost... I've look at everything that i could think of and I don't see any burned wires or any wires that are grounded. Any other ideas? Thanks for the help guy, LF

Re: HELP!!! on 99 suburban
 

5.7L or 7.4L

Shoot a PM to R'Addiction. He might can help with some remote TS'ing ideas.

FYI, AAA has Truck and Trailer towing coverage under their RV plan.
Depending on your boat size, you might be able to get a P/U from Enterprise Rental to get the boat home in a bind. They do rent bigger vehicles at some locations; especially Florida. Might also check with the local dealers too; as sometimes they do the same.

Being 650 miles from home, I might just take it to a Chevy dealer. It won't be the cheapest, but at least they should be able to narrow down the trouble the quickest, and not rake you over the coals with trial and error like a mom & pop shop might.

Re: HELP!!! on 99 suburban
 

Thanks for the reply. It has the 5.7. It is at a mom and pop shop now and I gave them till the end of the day to figure it out before I get it towed to the chevy dealer. I'll shoot R'Addiction a line and see what he says. Thanks, LF

Re: HELP!!! on 99 suburban
 

I have a 99 suburban, how maney miles on yours?
I have had some minor issues over the years.
ours has 80,000 miles, in the last 4 months we had to replace oil cooling lines, water pump and fuel pump.
good luck,

Re: HELP!!! on 99 suburban
 

Liquid, I just got home and out of the shower. I'll check for any similar cases and look over some wire diagrams. Sorry didn't get back to ya sooner late night on the shop. Stay tuned

Re: HELP!!! on 99 suburban
 

If I had to take a guess, ignition switch or wire shorted where they pass throught the firewall. Take it to a dealer though, it will be cheaper in the long run.

Re: HELP!!! on 99 suburban
 

Mine has 120,000 and i've replaced cap, rotor and plugs in the last 2000 miles or so and that's been it so far. It's been a good 4x4 but this may be the end of the line..... I see a 4x4 4 door Cummins Dodge in my near future.....

Re: HELP!!! on 99 suburban
 

Thanks R'Addiction, any help would be great. LF

Re: HELP!!! on 99 suburban
 

Your probably right. What sucks about it is i'm 650 miles away and don't have the control over it that I would like....

Re: HELP!!! on 99 suburban
 

Any Codes set?

Re: HELP!!! on 99 suburban
 

This is tough....Check pink wire from Under hood fuse block at ECM 1 fuse....goes to a splice then to another splice, then off to vcm, ignition coil, ign. control module, crankshaft position sensor. This is a time consumer and is probably something near the fuse box. I have a 2000 Classic w/454 and was out looking around to see if anything jumps out at me. Wish I could be of more help. I'll call the shop and ask around if you want. I'm off today. Good Luck and when they do find it give us an update.

Re: HELP!!! on 99 suburban
 

Thanks R'A,
I did trace the pink wire under the fuse block to the first splice and saw no sign of problems. Granted I was on the side of I-10 so i didn't get too in depth. I'm going to call the mechanic and see was the lastest and greatest is. Thanks again for you help. LF

Re: HELP!!! on 99 suburban
 

These vintage have wiring issues with the Fuel Pump/ relay and the pump itself. Have them unhook the wire to the fuel pump and try it. If it does not blow the fuse a new pump is in order- not cheap- drop the tank.

It might also be as simple as a new ignition switchh also.

Good luck

Wannabe

Re: HELP!!! on 99 suburban
 

Hey Wannabe,
I did drop the tank and pulled the fuel pump on the side of I-10 with no luck. I went ahead and bought a new fuel pump but didn't want to install it till i can find the other problem...
the wierd thing is that I was 2000 miles into this trip, running 75 mph and it just died. Everything electrical but what runs off this fuse works.... Anybody in the market for a used 4x4 Suburban?

Re: HELP!!! on 99 suburban
 

make sure the oxygen sensor wires are not shorting on the exaust or exaust heat sheilds,I beleive you have 4 o2 sensors on the exhaust.

Re: HELP!!! on 99 suburban
 

Hi, my name isMichael Garibay here in CA. I own an auto shop and ran into this same problem on a '98 tahoe (same motor) . First try unplugging the large injector connector behind the throttle body(black in color and about 2"X3" square) then see if it blows fuse. If it doesn't you may have one of the injector wires rubbed through(power side) under the upper plennum.I just removed the upper plennum rerouted the wire(cyl #2 in my case)away from the bracket that holds up the connector and put a little silicone on the wire and down the road he went.Good luck Mike
Qualtiy Auto Service Pomona ca.

Re: HELP!!! on 99 suburban
 

Hey Mike,
You might have hit the nail on the head. When I was on the side of the road I did unplug the injector plug but it still blew the fuse. Yesterday when I talked to the guy that is looking at it he said that he did the same thing and it DIDN'T blow. I'm not sure what he did vs. what I did but i think we're on the right track. Thanks for the info.......LF