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r/gmcsierra

▲ 8 r/gmcsierra

Fuel Pump PCM Recall

Got this notification in the app today. I currently have no noticeable issues with the truck, and it seems this recall is preemptive. “Certain vehicles” affected, so it ultimately might be a non-issue for me.

Has anyone had this issue? What was the downtime? My truck is essentially a mobile office, I’m on the road from site to site most of the day. Taking this in for service puts me out of work for a day or several, so just trying to gauge how long this will take and if I’ll need to set up a rental if they don’t offer a loaner.

u/OldeMeck — 5 days ago
▲ 8 r/gmcsierra

🌽 E85 🌽 2020 GMC Sierra 1500 L87

Haven’t seen much people do E85 on the 6.2 so, here’s mine! Just got it installed, everything seems to be fine! 91 in my area is around $6.50 and E85 is $2.09 I think it’s worth it! Anybody else running E85 on the L87?

u/RogerrDaP — 5 days ago
▲ 3 r/gmcsierra

2026 Sierra SLT 3.0 Duramax Auto Start/Stop not working?

I have auto start/stop on for my truck and in all honesty its only worked the first week I bought the truck and that's it. I've turned off AC and everything and test drove the vehicle, auto stop doesn't kick on. DEF full, fuel filled and etc. Point being should I take it back to the dealer to get it troubleshot or just thug it out?

reddit.com
u/Itsreallyjesus21 — 5 days ago
▲ 2 r/gmcsierra

70 Years Of Tradition Replaced By A Computer: GM Kills The Manual Dipstick On New V8 Trucks

Looking at the new '27 and both 350 and 400 have lost the dipstick for an on screen computer sensor. Are these reliable? Or potential limp mode/dealer visit waiting to happen?

carbuzz.com
u/ctesla01 — 5 days ago
▲ 14 r/gmcsierra

what Sierra feature did you think was pointless until you actually started using it?

there are a bunch of features on these trucks that are easy to ignore until you find the one situation where they suddenly make sense.

which one changed your mind after actually living with the truck for a while.

could be something small like a camera view or something you originally thought was just marketing.

reddit.com
u/Status_Load_8634 — 14 days ago
▲ 71 r/gmcsierra

Very sad but happy to still be here!

This morning on my way to work I hydroplaned on the highway and ping ponged between concrete barriers.

I’m ok thanks to this truck! A few bumps
and airbag burns but could have been a lot worse.

It would have been a year old in 10 days 😞

New truck day is in my future which is I guess the bright side to an otherwise crappy day! Wear your seatbelt kids!

u/IamAustinCG — 14 days ago
▲ 5 r/gmcsierra

Plastic Fading

This does not look normal to me. It is the black plastic cover on both side of the lower windshield near the support pillars. This is a 2025 purchased in Dec of 24, 14,000 miles and always garaged when not in use. less

u/NewCouplesAdventures — 14 days ago
▲ 3 r/gmcsierra

Anyone know what this sound is? Clicking sound

It’s much louder off a cold start but it’s still loud enough to hear over the exhaust most times

u/NaiveWing4381 — 13 days ago