When the fourth generation Corvette was introduced in 1984, many innovative build techniques were implemented. Early Corvette amenities were becoming standard equipment while new options filled every available inch of dash space. The 1984-1989 C4 dash had more modules and controllers to integrate behind an already tight dash area. 1990-1996 Corvettes added more modules along […]
Category: C4 (1984-1996)
C4 Production Numbers
By the time 1982 rolled around, the C3 Corvette was 14 years old and the chassis that it was based on dated back to 1963. Needless to say, a lifetime for a chassis and body style. The Corvette team at GM was well aware of this, and had been working feverishly on the next generation […]
HVAC Odor Technical Service Bulletin
While we know it’s not the most exciting topic to discuss, we are aware of this issue through several Q&A magazine sections and forum postings. The problem centers on a musty odor coming from the vents whenever the A/C is activated. The odor seems to diminish after a short time, but recurs after the car […]
LS Engine Swap for C4 Corvettes
The following is an engine swap workshop guide that was produced by Chris Petris (www.petrisenterprises.com) in cooperation with Corvette Central, with assistance from Jared Ochs of Current Performance (www.currentperformance.com), and Chris McDonald of www.mcspeed.com. Developed in conjunction with GM Performance, Corvette Enthusiast, TCI, Holley and Vette Brakes & Products. Photo credit: Chris McDonald. We will […]
Tech Tips: C4-C6 Tire Pressure Monitoring Systems
Our technical assistance reps get a lot of questions regarding the Tire Pressure Monitor System (TPMS) that is standard on C4, C5, and C6 Corvettes. The TPMS became a requirement for all vehicles under 10,000 lbs. produced after September 2007. An interesting side note is that the band sensors which are so prevalent today were […]
C4 Fuel Injection Overview
Speed density was the first fuel control system used on 1982-1984 Corvettes. It was also used on the 1990-1993 cars. Speed density uses a manifold absolute pressure sensor (MAP sensor) to calculate the necessary fuel load. The 1990-1991 cars have a MAP sensor bolted directly to the intake plenum. The 1992-1993 cars have the MAP […]
C2, C3 & C4 Air Conditioning A/C Retrofit
Basic System Operation The compressor pressurizes the refrigerant then it enters the A/C condenser as a gas. The high temperature, high pressure gas is cooled as it goes through the condenser. This changes the gas to a liquid. Then the liquid goes to the evaporator through an expansion valve or metered orifice. This quickly depressurizes […]
C4 Interior Overview
The C-4 interior is comprised mostly of plastic. The 1984-1989 dash carrier is made entirely of plastic. All of the plastic dash fascia can be damaged quite easily just by over-tightening the screws. I use a screwdriver or a clutch-operated power screwdriver. When using a clutch-operated screwdriver, be sure to use the lowest setting to […]
Corvette Glossary of Terms
For your convenience, the following is a glossary of terms commonly used in the Corvette community. ABS Anti-lock Braking System. Sensors monitor wheel rotation and prevent wheel lockup during braking by modulating hydraulic pressure. ASR Acceleration Slip Regulation A-Pillar The post section between the door glass and the windshield.
Automatic Transmission Maintenance
If you own a 1984 to 1996 Corvette you probably have an automatic transmission. Most Corvette owners prefer the automatic transmissions to the manual transmission. This means that most of you reading this article have an automatic transmission in your Corvette.