dsr611

https://www.1aauto.com/2013--gmc-sierra-1500-front-sway-bar-link-driver-or-passenger-side-general-motors-oem-25918049/i/gmssl00002?f=939517&y=2013&msclkid=3d80e07ba7ba1723854fbde1ec2ec8cc&utm_source=bing&utm_medium=cpc&utm_campaign=Shopping - ECPC - 1A - SuspensionSales&utm_term=4577816663999437&utm_content=Shopping - ECPC - 1A - SuspensionSales

Stepper motor for the gauge may be failing...that generation of GMs have a bad problem with stepper motors going bad.

CEl light on? Any codes?

Yep...filter for the evap vent valve

Should be three fuse panels...one under the hood on drivers side, one on drivers side of dash, another on passenger side of dash You can find all this info in the owner's manual Pages 376-383 https://www.manualslib.com/manual/1142690/Gmc-Sierra-Denali-2017.html?page=377#manual

My truck came with one of those books also, but it somehow got lost. I wish there was someway I could have used a computer or phone to look it up...surely those things can be found online

Hard to give you an answer if we don't know what year, make, and model vehicle you're asking about

Belt--yes WP--not unless it is leaking

I also had checking with a dealer for a buildsheet and looking up RPO codes, but deleted them and forgot to put them back on the reply.

About midway down the page, under the DETERMINING YOUR TRIM there is a VIN decoder https://www.webuyallcarsinnj.com/how-to-find-your-cars-trim/

https://www.amazon.com/Denso-550-2400-TPMS-Sensor/dp/B011ING6VE/ref=sr_1_1?keywords=5502400&qid=1566386191&s=gateway&sr=8-1

Upstream of catalytic converter-- #2133533 (AC DELCO) Downstream of converter-- # 2133538 (AC DELCO)

Those sections are already on the site as linked in the post above

Should be in the fuse/relay panel on the side of the dash panel (Driver side) or in the fuse/relay block under the hood.