The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 6L80 transmission rebuild, relearn, & TCC wiring

vannatta20 · 03-01-2018, 04:07 PM

You need a good scanner. Scan under the engine section. Then go to cruise data. This will show the brake signal with it running or not. The bcm brake signal only works will the engine is running but the bcm is not needed.

03-01-2018, 04:07 PM	#7
vannatta20 Registered User Join Date: Oct 2011 Location: Las Vegas, NV Posts: 290	Re: 6L80 transmission rebuild, relearn, & TCC wiring You need a good scanner. Scan under the engine section. Then go to cruise data. This will show the brake signal with it running or not. The bcm brake signal only works will the engine is running but the bcm is not needed.