Thermo Master Power Chip 1991 C1500/C2500 350 TBI

Name: Thermo Master Power Chip 1991 C1500/C2500 350 TBI
Brand: HYPERTECH
SKU: 533-121122
Price: 183.15 USD
Availability: InStock

^$183¹⁵

Ships on Sep 04, 2026

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GM Truck/SUV/Van

1991 C1500/C2500 350 TBI
Automatic Transmission

Plug-In Performance for 1980's and 1990's GM Vehicles

The premiere name in classic automotive ECM programming, Hypertech became famous with this replaceable power chip, or "PROM", for older vehicles. Before the OBD-II port, OE computer chips on the ECM had to be physically replaced. Hypertech's Thermo Master Chip is one of the best PROMs available. It can create instant power by adjusting spark advance and air/fuel ratio.

Such adjustments can also increase fuel mileage potential with sensible driving. Designed for use with a PowerStat 160° or 180° Thermostat, Thermo Master Chips eliminate tuning guesswork... just plug in and drive.

Part TypeComputer Chip

Product LineHypertech Thermo Master Power Chips

BrandHYPERTECH

Package Height2.25

Package Width5.0

Package Length8.0

Weight0.2 PG

Part CategoryPerformance Parts

QuantitySold individually

Part FitmentDirect Fit

Vendor Part Number121122

Package Qty1

Package TypeEA

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Some parts are not legal for use in California or other states with similar laws / regulations

Thermo Master Power Chip 1991 C1500/C2500 350 TBI

Plug-In Performance for 1980's and 1990's GM Vehicles

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