Tcc trouble

Need help.2001 won’t shift into OD and guages don’t work unless trip permit button is pushed in! Ugh. Please help? Thanks.

Miles? 2wd or 4wd? If 4wd, do you have Auto 4wd? I had a 2000 Blazer LT with Auto 4wd, what is a “trip permit” button? There is no mention of it in the Owner’s Manual.

How old is the battery? I was lucky to get 3.5 years out of one. On my Blazer, if the battery charge was low (~12.1 V) the idle speed was higher and torque converter lockout would not engage.

Ed B.