BCM

KINSEYJAMES

MEMBER
2003 GMC YUKON
5.3L
V8
4WD
AUTOMATIC
200,500 MILES

My gauges (speedometer, tachometer, gas, oil, temperature and battery) and lights turned off. I found out it might be the body control module? Everything else works fine the radio, the heat/AC. Just wondering if it is a fuse or if it is actually the BCM? Tried switching with a Tahoe BCM, did the procedure and it almost worked so I switched it back. After driving for an hour it started working again.

5 Replies

HMAC300

MECHANIC
48,601 POSTS

BCM's are VIN number specific so others will not work unless programmed to your vehicle. If it works now then okay, but if not then it has to be scanned for codes to see what is wrong with BCM or it may be a connection problem.

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Wednesday, April 12th, 2017 AT 6:53 AM

KINSEYJAMES

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25 POSTS

So can I run a diagnostic test on the BCM? Or will it show up on the test? What kind of scanner would I need to use?

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Wednesday, April 12th, 2017 AT 7:08 AM

KINSEYJAMES

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25 POSTS

And what kind of connection problem is it?

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Wednesday, April 12th, 2017 AT 7:09 AM

HMAC300

MECHANIC
48,601 POSTS

The connection problem may be a bent pin or just not making a connection to BCM you need a professional scanner to scan a body module but only dealers can reprogram them.

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Wednesday, April 12th, 2017 AT 9:39 AM

KINSEYJAMES