All Articles
Complete Brake System Guide - Square Body Trucks
# Complete Brake System Guide - Square Body Trucks ## Overview The brake system is one of the most critical safety components on your 1973-1987 GM Square Body truck. Understanding …
Dana 60 Axle Performance Guide - Square Body Trucks
# Dana 60 Axle Performance Guide - Square Body Trucks ## Overview The Dana 60 front axle was the heavy-duty option for 1973-1987 GM Square Body trucks, primarily found in …
10-Bolt Rear Axle Configurations and Identification - Square Body Trucks
## Overview The **10-bolt rear axle** was the standard rear differential configuration for most 1973-1987 GM Square Body trucks, including C10, C20, K10, K20, K5 Blazer, and Suburban models. Named …
Complete Axle Identification and Upgrade Guide - Square Body Trucks
# Complete Axle Identification and Upgrade Guide - Square Body Trucks ## Overview Understanding the axle configurations in 1973-1987 GM Square Body trucks is crucial for maintenance, repair, and performance …
Axle Identification, Maintenance, and Replacement - Square Body Trucks
## Overview The axles in 1973-1987 GM Square Body trucks are critical drivetrain components that transfer power from the transmission and transfer case to the wheels. Understanding axle identification, maintenance, …
Engine and Transmission Compatibility Guide - Square Body Trucks
# Engine and Transmission Compatibility Guide - Square Body Trucks ## Overview Understanding engine and transmission compatibility is crucial for Square Body truck owners planning swaps, rebuilds, or restorations. From …
Transfer Case Selection and Identification Guide - Square Body Trucks
# Transfer Case Selection and Identification Guide - Square Body Trucks ## Overview Transfer case selection is crucial for Square Body truck owners planning drivetrain swaps, rebuilds, or upgrades. The …
Classic GM Truck Manual Transmission Options - Square Body Trucks
# Classic GM Truck Manual Transmission Options - Square Body Trucks ## Overview The 1973-1987 GM Square Body trucks offered several manual transmission options that varied significantly by year, model, …
700R4 Transmission Performance & Rebuild - Square Body Trucks
## Overview The 700R4 (Turbo Hydra-Matic 700R4) transmission was GM's first electronically controlled 4-speed automatic overdrive transmission, introduced in 1982 and used in Square Body trucks through 1987. This transmission …
Transmission Systems and Service - Square Body Trucks
# Transmission Systems and Service - Square Body Trucks ## Overview The transmission is the heart of your Square Body truck's drivetrain, responsible for transferring power from the engine to …
Chevrolet 292 Inline-6 Engine Guide - Square Body Trucks
## Overview The Chevrolet 292 cubic inch inline-6 engine was a heavy-duty workhorse option available in Square Body trucks from 1973-1987, primarily found in C20/C30 and K20/K30 models. This cast-iron, …
LS/LT Engine Swap Guide - Square Body Trucks
# LS/LT Engine Swap Guide - Square Body Trucks ## Overview The LS/LT engine swap has become one of the most popular modifications for 1973-1987 GM Square Body trucks, offering …
6.2L Detroit Diesel Engine - Square Body Trucks
## Overview The 6.2L Detroit Diesel (RPO LH6) was General Motors' first serious attempt at a light-duty diesel engine, available in Square Body trucks from 1982-1987. This naturally aspirated V8 …
Chevrolet 250 Inline-6 Engine - Square Body Trucks
## Overview The Chevrolet 250 cubic inch inline-6 engine was the standard powerplant in many Square Body trucks from 1973-1987, serving as the base engine option across C10, C20, K10, …
305 Small Block Chevy Engine Guide - Square Body Trucks
## Overview The Chevrolet 305 cubic inch (5.0L) small block V8 was one of the most common engine options available in Square Body trucks from 1976-1987. Introduced as GM's response …
454 Big Block Chevy Engine Guide - Square Body Trucks
# 454 Big Block Chevy Engine Guide - Square Body Trucks ## Overview The **454 cubic inch Big Block Chevy** represents the pinnacle of factory performance for Square Body trucks …
350 Small Block Chevy Engine Guide - Square Body Trucks
# 350 Small Block Chevy Engine Guide - Square Body Trucks ## Overview The Chevrolet 350 cubic inch (5.7L) small block V8 was the most popular and versatile engine option …
Fuel System Overhaul and Maintenance - Square Body Trucks
# Fuel System Overhaul and Maintenance - Square Body Trucks ## Overview The fuel system in 1973-1987 GM Square Body trucks underwent significant changes during the production run, transitioning from …
Cooling & HVAC Systems - Square Body Trucks
# Cooling & HVAC Systems - Square Body Trucks ## Overview The cooling and HVAC (Heating, Ventilation, and Air Conditioning) systems in 1973-1987 GM Square Body trucks are critical for …
Electrical Systems & Lighting - Square Body Trucks
## Overview The electrical and lighting systems in 1973-1987 GM Square Body trucks represent a critical transition period in automotive electrical design. These systems evolved from simple 12-volt setups to …