r/GMT400
27k members
r/GMT400 is a subreddit with 27k members. The most common kinds of discussions are solution requests and advice requests, and the community frequently discusses ac, looking for, truck, c1500, and transmission, 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 Themes in r/GMT400
#1
Solution Requests
: "headlight recommendations"
10 posts
#2
Advice Requests
: "Need some opinions."
6 posts
#3
Pain & Anger
: "96 C1500 misfire issue at 2000 rpm"
1 post
#4
Money Talk
: "Good deal or am I tripping?"
1 post
Popular Topics in r/GMT400
#1
Ac
: "Rebuilt Ac"
11 posts
#2
Looking For
10 posts
#3
Truck
: "My wife inherited this 1997 3/4 ton earlier this year."
8 posts
#4
C1500
: "People seemed bummed about my 94 C1500 getting whooped by a stolen Hyundai. I figured I’d share the video of it taking the hit."
8 posts
#5
Transmission
: "Tranny Question"
5 posts
#6
Engine
: "5.3 swap on a 92obs"
4 posts
#7
Swap
: "5.3 Swap on a 92obs"
3 posts
#8
Fuel
: "Fuel injector, install fail"
3 posts
#9
Headlight
: "New cheap lights"
3 posts
#10
Tired Of
2 posts
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
+7k members(38.3%)
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About
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This page gives a focused view of r/GMT400, including current member size, discussion patterns, product reviews, and related communities to explore.
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Last updated: July 22, 2026