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Hi everyone, I have been working on a 1997 Chevy 1500 WT. I just happened to be working under the dash and noticed that the green wire that goes into the firewall harness connection was disconnected. Does anyone know what this green wire is for? (please refer to photo below) I looked at the wiring diagram and it looks like it goes to the MAF which I think is for the speedometer operations. Now my second question is, if it is for the MAF where should I try to reconnect. I obviously can't get it back into the bulkhead. Can I bypass the bulkhead and run a jumper wire?
I would be appreciative for any help.
Contributing Writer, GM-Trucks.com
General Motors has announced that NHTSA is mandating a safety recall for the following vehicles:
2014-2018 Chevrolet Silverado and GMC Sierra Pickups (1500 / 2500 / 3500) 2015-2018 Chevrolet Suburban, Tahoe, GMC Yukon vehicles 2015-2017 Cadillac Escalade
NHTSA reports that the amount of vacuum created by the vacuum pump may decrease over time. The group says that as the vacuum level drops, the brake assist decreases, and that this increasing braking effort, extending the distance required to stop the vehicle, thereby increasing the risk of a crash. This new recall covers 3.4 million vehicles.
The Problem: The brake pump uses engine oil to lubricate itself. If the pump becomes clogged with engine oil sludge the units ability to create vaccum is diminished over time. As a result, braking force and ability also drops. The issue is usually accompanied by a "Service Brake Assist" warning message in the dash.
The Fix: GM will reprogram the computer that controls the secondary brake assist pump. The secondary pump will now activate at lower speeds and different situations quicker to compensate for any lost output from the main pump. Since the pumps are not failing, GM has decided not to replace them.
GM's number for this recall is N192268490. In compliance with federal law, GM will notify owners, typically by snail mail. GM says that its dealers will reprogram the Electronic Brake Control Module. However, GM has not yet provided a notification schedule. Owners may contact Chevrolet customer service at 1-800-630-2438, Cadillac customer service at 1-800-458-8006 or GMC customer service at 1-800-462-8782.
If you own one of these vehicles and wish to check to see if your vehicle is included (or not) you can do so at this link immediately.
As with every safety recall, customers will not be charged by GM for the needed repairs or modifications.
NHTSA's public information on this issue indicates that many accidents have been reported to NHTSA including some with injuries. This recall is the result of a NHTSA investigation that lasted nearly a year. In its investigation report, NHTSA noted the following details about the problem:
By David Acosta
Theft deterrant light comes on, airbag light comes on, and speed odometer going crazy. All of my gauges basically go crazy on my cluster after 2 minutes of driving. I want to say its the body control module but I also think its the HMI. I need help with this issue. Do i order a new BCM and have it snet in to get programmed to my VIN or take it to the dealer and
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