Dorman HVAC Pressure Switch 904-625 — Direct-Fit A/C Transducer for 1989–1993 Chevy & GMC Trucks, Restores Compressor Control

The Dorman 904-625 HVAC pressure switch is a direct-fit replacement A/C transducer designed to restore proper air conditioning control when the original switch fails.

If your vehicle’s air conditioning stopped operating or cycles unpredictably, a faulty pressure switch is a common culprit. The Dorman 904-625 replaces corroded terminals or damaged connectors on the factory pressure switch and is built to match the original fit and function for a range of late‑1980s and early‑1990s Chevrolet and GMC trucks and SUVs. This part lets you make a focused repair without replacing larger A/C components.

How will this switch solve my A/C problem?

When the original pressure switch has corroded terminals or a broken connector, the compressor clutch or safety circuits can lose continuity and prevent the system from running. Installing the Dorman 904-625 restores those electrical connections so the A/C system can resume normal control and cycling.

• Replaces failed OEM switch that interrupts compressor engagement
• Restores proper electrical continuity and sensor feedback
• Avoids unnecessary replacement of compressor or dryer

Is the Dorman 904-625 easy to install?

Yes — the unit is designed as a direct replacement, so you can swap it in with basic hand tools. No special equipment or advanced diagnostics are required for the mechanical and electrical connection when the vehicle is accessible.

• Direct-fit design matches original mounting and connector
• Simple removal and reinstallation with common hand tools
• Ideal for DIY mechanics or professional technicians seeking a fast repair

Which vehicles does this pressure switch fit?

The Dorman 904-625 is compatible with many Chevrolet and GMC trucks and SUVs from 1989 through 1993. Always confirm fit by entering your vehicle’s year, make, model and trim in the fitment or garage tool before ordering to ensure exact compatibility.

• Fits Chevrolet models such as Blazer, C/K series trucks, Suburban (1989–1993)
• Fits GMC models including C/K series, Jimmy, Yukon, Suburban (1989–1993)
• Check the garage tool for trim-specific confirmation

What quality assurances and practical benefits does this replacement provide?

Dorman tests this pressure switch for proper fit and function to match the factory part’s performance. The switch is manufactured to restore reliable A/C control while keeping installation straightforward and affordable compared with larger component replacements.

• Quality-tested to ensure correct operation and fit
• Addresses common failure points like corroded terminals and broken connectors
• Cost-effective repair that preserves original system components

Who is this for: The Dorman 904-625 HVAC pressure switch is aimed at owners and mechanics of late‑80s to early‑90s Chevrolet and GMC trucks and SUVs who need a dependable, OEM-compatible repair part. If you want to fix an A/C system that won’t engage or cycles improperly without replacing major components, this direct replacement switch is a practical choice for do-it-yourself repairs and professional garages alike.

Features:

• Direct replacement - this A/C transducer switch is an exact replacement for the original switch
• Simple repair - this A/C switch replaces an existing switch with corroded terminals or a broken connector
• Easy installation - no special tools required
• Quality tested - switch has been tested to ensure proper fit and function
• Ensure fit - to make sure this part fits your exact vehicle, input your make, model and trim level into the garage tool