You will have to take the dash apart and replace the bulb.
That means the engine is running HOT. Need to check the coolant level and check for coolant leaks.
yes, and what codes are you asking about "check engine" or anti lock radio codes?
It means there is a problem in the emission system are transmission. Need to have engine scaned with a engine scanner. Some parts stores will do that for free.
An emission or performance problem will cause the Check Engine Light to illuminate. You can take your vehicle to Auto Zone and have the computer scanned for trouble codes. There is no charge.
Vacuum leak?
Check fuse and/or relay.
Check the fuse
Check Owners Manual
The best place to find a Chevy Tahoe LTZ would be a Chevy dealership. Or, one could check out a site such as AutoTrader, which would list vehicles for purchase.
Check gauge? Never heard of a check gauge light. If you are referring to the check engine light it is on because there is a problem with the emissions system. You need to have the ECU scanned by a professional.
first check the air filter and replace if dirty. Second see if the check engine light is on if it is have it checked for codes and replace whatever is wrong.
Check your fuses.