20 Most Recent
1999 Chevrolet Express - Page 11 Questions & Answers
Mechanic check fuses and instal new back up switch and steel not working reverse lights,backing camera and dome lights???thi is about chevy express 2500 2007 year
You didn't take it to a good enough mechanic . Backup Lamps
The B/U LP 20 A fuse in the underhood fuse block supplies battery positive voltage to the normally open park neutral position (PNP) switch. When driver places the gear selector lever is in the REVERSE position, the switch closes and the voltage is from the switch to the powertrain control module (PCM). The PCM signals the BCM on the class II serial data circuits that the backup lamps are requested. The BCM supplies voltage on the backup lamp supply voltage circuit to the backup lamps and to the automatic day/night mirror. The backup lamps are grounded at G401. Voltage for the backup lamp supply voltage, without RPO YF7 the courtesy lamp supply voltage, and with RPO YF7 the courtesy lamp high control circuits is from the TBC 2 fuse 18 in the underhood fuse block directly through the BCM to these circuits.
Backup Lamps Inoperative
Step
Action
Yes
No
Schematic Reference: Exterior Lights Schematics
Connector End View Reference: Lighting Systems Connector End Views or Data Communication Connector End Views
1
Did you perform the Diagnostic System Check - Vehicle?
Go to Step 2
Go to Diagnostic System Check - Vehicle
2
Verify that the backup lamps are inoperative.
Do the backup lamps operate normally?
YES - Go to Testing for Intermittent Conditions and Poor Connections
NO - Go to Step 3
3
Is only one backup lamp inoperative?
YES - Go to Step 5
NO - Go to Step 4
4
Use the scan tool to check if there are any codes set in the current or history Powertrain DTC Information.
Are any codes present?
Go to Diagnostic System Check - Vehicle
Go to Step 6
5
Test the backup lamp supply voltage and ground circuits for an open or high resistance. Refer to Circuit Testing and Wiring Repairs.
Did you find and correct a condition?
Go to Step 10
Go to Step 8
6
Test the backup lamp supply voltage circuit for the following:
• An open
• A high resistance
• A short to ground
Refer to Circuit Testing and Wiring Repairs.
Did you find and correct a condition?
Go to Step 10
Go to Step 7
7
Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Circuit Testing and Wiring Repairs.
Did you find and correct the condition?
Go to Step 10
Go to Step 9
8
Replace the inoperative backup lamp bulb. Refer to Backup Lamp Bulb Replacement .
Did you complete the replacement?
Go to Step 10
--
9
Replace the BCM. Refer to Control Module References for replacement, setup, and programming.
Did you complete the replacement?
Go to Step 10
--
10
Operate the system in order to verify the repair.
Did you correct the condition?
System OK
Go to Step 3
2/9/2021 9:50:32 PM •
Chevrolet...
•
Answered
on Feb 09, 2021
My 05 chevy express starts with no key in ignition as soon as I hook up battery.
The solenoid on the top of the starter is stuck or the drive is stuck in the ring gear. Do this remove the starter and see why the drive is stuck out in the engaged position. if the drive moved Back as you loosen the starter reinstall it and this time keep the drive as far away from the flywheel as you can then tighten. I hope this helps. Take care. If you have more questions for me use testimonial and it will show up in my email.
3/16/2019 3:24:04 AM •
Chevrolet...
•
Answered
on Mar 16, 2019
Have 2007 express van 4.8 goes in drive and moves but won't change gears was changing fine till now have any suggestions what could be
Most current automatic transmissions will be put into a "limp" mode if the electronics detect a fault in the transmission. That is, the transmission will go into one gear (usually second or third depending on how many speed ranges the transmission has) and allow you to drive it slowly to a service department or transmission shop. The intent is to prevent further damage by continuing to drive with the problem. It's possible the problem is relatively minor and inexpensive to repair, but continuing to drive it will almost certainly cause more damage (and be more expensive) to repair.
4/15/2018 12:23:05 AM •
Chevrolet...
•
Answered
on Apr 15, 2018
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