GM said to use 5w30 in the winter time. 10W30 in the summer time.
If you use heavy oil it will not lube the valve train.
what type of transmission does a 2005 chevy tahoe have
what type of oil is recommended for a 2008 chevy tahoe
what type of gear oil to use in 2003 chevy tahoe 4wd
The 2005 Chevrolet Tahoe has overhead valves (OHV).
That is a 4L60E
5w 30
H11
SAE 10w30
5w30 only
87 octane
DEXCOOL / the orange color.
the best would be unleaded