r/GMT400 is a subreddit with 28k members. The community frequently discusses looking for, tired of, suburban, truck, and wiring, and they frequently recommend/review battery, tire recommendations, and pump.
Use this subreddit to post pictures of your GMT400 trucks, show us your mods, or ask for advice.
Popular Topics in r/GMT400
#1
Looking For
9 posts
#2
Tired Of
2 posts
#3
Suburban
2 posts
#4
Truck
2 posts
#5
Wiring
2 posts
#6
Ac
2 posts
#7
Battery Drain
2 posts
#8
Gaskets
2 posts
#9
Cheyenne
2 posts
#10
Engine Temps
1 post
Products Discussed in r/GMT400
Battery
12 reviews
#1
Optima
5.0★ from 4 reviews
#2
Walmart
4.0★ from 2 reviews
#3
NAPA
4.0★ from 1 review
Tire Recommendations
7 reviews
#1
BFG
5.0★ from 2 reviews
#2
Cooper
4.0★ from 1 review
#3
Firestone
5.0★ from 1 review
Pump
2 reviews
#1
EP381
5.0★ from 1 review
#2
Delphi
5.0★ from 1 review
Member Growth in r/GMT400
Yearly
+8k members(38.7%)
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About
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Last updated: October 18, 2026