it #4 under the truck on the frame which that unit run u $1000 at the dealer if you can pull it off and find a matching # on the unit and check ebay u can find one for $50-$150 make sure it match number
Start the engine.
Idle the engine for 1 minute.
Loosely install the surge tank cap. DO NOT allow the system to build up pressure.
Cycle the engine from idle to 3,000 RPM in 30 second intervals until the engine coolant reaches 99°C (210°F) and the thermostat opens.
Shut off the engine...
Brake/ ABS Light- c0241/ c00242/c0242-0246-0265-0253 replace your EBCM
p0410 check your Air pump for vacuum and make sure it running if not replace
using the scanner and give a ON command see it running
sound like your bcm about to crap out
What happens is when I turn the key the Tahoe does not start and there is absolutely no noise, clicking, grinding or anything.
your security light on?
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