What should the voltage be on a GMC Envoy?
Specifically, you’ll need to set it to 20V DC. With your Envoy turned off, you’ll connect the negative side of the meter to the negative battery post or wire. You’ll then touch the positive side of the voltmeter to the positive battery wire. With the engine off, you should get a reading somewhere between 12.0 volts and 12.6 volts.
What are the symptoms of a bad alternator in a GMC Envoy?
Here are the most common symptoms of a bad alternator in a GMC Envoy: A typical alternator Battery Light The battery light is designed to tell you that there is not enough voltage to properly charge the battery, or that the battery itself is not holding the proper voltage. In rare occasions the service engine soon light may light up.
Why does my envoy idle at 600 rpm?
These motors idle at 600 RPM give or take and a worn motor mount will produce a felt vibration at idle that goes away just above idle. If you have never changed the mounts, I would consider that a possibility. Only use AC mounts, the aftermarket is very hit or miss, biased to miss, on damping the 10 Hz frequency at idle.
Do you need an OEM Service Manual for envoy?
Only use AC mounts, the aftermarket is very hit or miss, biased to miss, on damping the 10 Hz frequency at idle. He did say he replaced the mounts with OEM. Need GMT360/370 Service Manuals?
What to do if your GMC Envoy has electrical problems?
If you have a dealer or after market security system or other device disconnect it and drive the car for a while or not and see if the problem goes away. One way is to pull the main CB for the system Most have one in line soemwher . If not find where it is powered and pull the connection or whatever it is and see what happens over a week!
Are there any recalls on the GMC Envoy XL?
I have a 2003 GMC Envoy XL and have never owned a car with as many recalls as they have had on the Envoy. The engineering flaws and just plain stupidity are too numerous to list here. 1. Fuel Leak due to rust (partially reimbursed by GM)
How to test for no communication problems on 2008 GM?
2.)Connect S1 and disconnect S2, all 5 modules on splice 1 bar is cut off. If you get normal voltage at KOEO (it means all 6 modules in splice 2 bar are OK. Do the same in testing splice 1 bar modules by disconnecting S7 after connecting S1. If voltage reading is still normal, it means all the 5 modules in splice 1 bar are OK.
What should normal voltage reading be on 2008 GM?
Normal voltage reading should be 5-7 volts.If not, the DLC connections from pin 1 to S1 is no good. 2.)Connect S1 and disconnect S2, all 5 modules on splice 1 bar is cut off.