lights flickering on 1999 GMC Yukon

i have changed the battery,belt,belt tensioner,and the alternator and the lights keep flickering and the charge light keep flickering what in the world could it be I am baffled

1 answer
You will need to have a thorough inspection of the battery and charging system by someone who is experienced in testing for poor wiring and wiring connectors. If you have poor connections at a wire terminal, you will see these types of problems, however you cannot see these, they need to be diagnosed with a Digital Volt Meter. Start with the battery cables and the charging circuit, then work your way up to the dash warning light/message circuits.