r/GMT400
26k members
r/GMT400 is a subreddit with 26k members. The most common kinds of discussions are solution requests and money talk, and the community frequently discusses transmission, engine, chevy, truck, and brakes, 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
: "Can't find a lift kit 😅"
6 posts
#2
Money Talk
: "is this really the market now?"
4 posts
#3
Pain & Anger
: "It's Been A Sad Day"
2 posts
#4
Advice Requests
: "Well the oil pump clocked out and the engine locked up.... What's the consensus on engine replacements?"
2 posts
Popular Topics in r/GMT400
#1
Transmission
: "Trans Rebuild"
12 posts
#2
Engine
: "Before/After Paint, Engine, Exhaust and other maintenance"
10 posts
#3
Chevy
: "My 1999 Chevy Suburban LT AKA The Clint Mobile"
10 posts
#4
Truck
: "Damn I love this Truck"
9 posts
#5
Brakes
7 posts
#6
Wiring
6 posts
#7
Help
: "I need Help."
6 posts
#8
Obs
: "5.3L vs 6.0L for Obs swap"
6 posts
#9
Fuel
6 posts
#10
Paint
: "Paint & Body Updates"
6 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
+6k members(33.6%)
Similar Subreddits to r/GMT400
r/AskAMechanic
166k members
37.2% / yr
r/AskMechanics
436k members
32.9% / yr
r/ChevyTrucks
90k members
25.6% / yr
r/F30
41k members
36.3% / yr
r/fordranger
82k members
25.6% / yr
r/GMT800
20k members
72.8% / yr
r/mechanic
117k members
27.0% / yr
r/MechanicAdvice
2.0M members
18.7% / yr
r/subaruimpreza
54k members
15.9% / yr
r/wrx_vb
31k members
35.0% / yr
About
GummySearch helps people research Reddit communities by organizing activity, growth, themes, and post-level signals into one place.
This page gives a focused view of r/GMT400, including current member size, discussion patterns, product reviews, and related communities to explore.
This data is synced periodically so insights stay current and useful for ongoing research.
Last updated: June 14, 2026