1999 Chevrolet Silverado Door locks

BALLARD333

MEMBER
1999 CHEVROLET SILVERADO
210,000 MILES

My door locks work with my alarm, as well as lock when I start driving, but do not work with the switches in the truck. The seat adjustment saver and the mirror adjustments dont work either. The seat heaters and the window switches work on both sides. Ive replaced the fuses, relays and even the module on the driver door and still nothing.

5 Replies

HMAC300

MECHANIC
48,601 POSTS

It will need scanning to find the problem take to a repair shop. Also check fuses.

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Thursday, August 1st, 2013 AT 6:11 AM

BALLARD333

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3 POSTS

Ive scanned it and nothing comes up at all. All fuses have been replaced. As well as relays.

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Friday, August 2nd, 2013 AT 12:44 PM

HMAC300

MECHANIC
48,601 POSTS

If it's an auto parts scanner it won't pic anything up they just get engine andtrans codes. You need either a tech 2 or apro style scanner. This may be a bcm problem.

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Friday, August 2nd, 2013 AT 12:56 PM

BALLARD333

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3 POSTS

If that is the problem. How would I go about fixing it? Replacing the bcm?

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Friday, August 2nd, 2013 AT 1:53 PM

HMAC300

MECHANIC
48,601 POSTS

No not necessarily modules are vin specific so yo just don't replace them you have to have a pro scan this as it may be something else and he may be able to reprogram the bcm instead of replacing it or like I said in last reply it can be a bad bcm which a pro will h ave to install and reprogram anyhow.