My denali will only click when i try to start it. what could it be?

Where's the clicking noise coming from ? Under the dash , under the hood in the engine compartment ? Do starter circuit voltage drop test ! When the key is in start position is there constant B+ voltage at the 10 amp crank fuse in the under hood fuse box ? This is an input to the PCM - engine computer to energize the starter relay ! Starter Voltage Drop The battery is good , starter is new ,what about the cables ? watch this video on testing starter circuit !

sounds alot like a bad battery

Sometimes new starters have to be shimmed so that the gear on the starter lines up with the gear teeth on the flywheel on the motor. The grinding noise is the reason I say that is what's wrong. If there were shims already there, try taking them out. I hope this helps you

the door window motor might be weak or has stoped working. my 2003 pass window motor went also, all others work fine still but the drivers is starting to get weak now, i tried to lube the cable and sliders but that did nothing. Replaced pass with a $60.00 used and its great.

Buy a Dodge

the mode door actuator is under the drivers side foot area on the left side of the heater box. it has two 7/16 screws and one connector

I had problems with my remote button, with battery fully charged turn on key for ten second, turn key off un-hook positve side of battery, re conect turn key to on postion then try to start, it worked for me I have a 2003 denali yukon XL, the motor would fire then stop.

get you alternator checked

check for loose battery connection. or maybe a cable going bad. they can corrode inside and the copper wire will turn green

This is definetly the battery, no charge or low charge in the battery, get it checked out.