2005 GMC Sierra 1500 Q&A

2005 GMC Sierra 1500 Question: Transmission in high gear from a stop, red light indicactor on 2WD is red

Transmission will be in high gear starting out and will not down shift when I accelerate. The red light at the 2wd selection is red was green before. -
Answer 1
check tranny fluid levels and condition. review when last serviced. it may be due. bring to tranny shop for diagnostic run. tranny tech. will advise. -
Answer 2
scan trans codes and ck fluid level and condition -