20 Most Recent 1999 Chevrolet Express - Page 12 Questions & Answers

You should go to www.reliable-store.com they have got books on every vehicle and also how to service/repair it, parts info, fuse box, gear box, wiring diagrams, electrical diagrams, fuse diagrams, error codes, etc everything

If you can rap the fuel tank on the bottom and the car starts, it's almost a guarantee that it's your fuel pump. You have to get it replaced. Your luck at the little rapping trick runs out after awhile.

seems like the multi-function switch is failing easy to replace and fairly common

I don't use synthetic oil unless the owners manual requires it. Just my opinion, not trying to argue. I've been changing my own oil and filter ever since my first car, now I'm 70. Check for proper oil pressure and oil fill level.

check cables or low battery

MAF is ALWAYS in the air duct between the air filter and throttle body. Remove the clamps. Replace MAF. Reinstall air duct and clamps

Have someone open the gas tank door and listen for a zooming sound as you turn the key to the on position (NOT CRANKING POSITION), If no sound, check the fuel pump fuse relays in the fuse box in the vehicle and under the hood. Also check the connections at the gas tank and the ground strap at the gas tank.

Review this information, maybe I need two or more post to send you the Wiring Diagrams.

Good luck... and remember rated this help.

1999 CHEVROLET TRUCK EXPRESS VAN - REPAIR GUIDE
Exterior Lights


Fig. 1 Hazard, Turn and Stop Lamp Signals(c)


Fig. 2 Headlamp and Panel Dimmer Switch Signals and Park Lamp Relay Control(c)


Fig. 3 Park/Turn, Marker, Tail/Stop and Backup Lamps - Except Cutaway(c)

Fig. 4 Stop and License Lamps(c)

Fig. 6 Trailer Wiring(c)

Fig. 7 Turn Signals(c)

Good luck!!!

Follow the link to read about this code and what causes it. U0109 Lost Communication with Fuel Pump Control Module FPCM eval ez write...

Autozone.com has diagrams for this model: http://www.autozone.com/repairinfo/repairguide/repairGuideContent.jsp?pageId=0900c1528004d7c3

Sounds like a fuel pump..I believe it is located in the gas tank,,,not hard to replace if you have good mechanical skills and some time!

When you say charging,do you mean amp reading or volt reading?Amps should rise when first started then drop.Volts should stay close to constant.The small wire going to the alternator to power the regulator in the alternator is just switched power.If the volts fall under 14 after ten minutes you may need to try a replacement alternator.