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OEM GM TSC Reversing Relay 3990842 3990842 1971 Corvette Camaro Chevelle Smog

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OEM GM TSC Reversing Relay 3990842 3990842 1971 Corvette Camaro Chevelle Smog
USD 69.00
Condition: see listing
LocationMinot US
ShippingFree shipping (check listing for details)
Seller fishwallman
100.0% positive · 2242 feedback
ListingFixedPrice · Active
Start time2026-03-16T16:19:50.000Z
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OEM GM TSC Reversing Relay 3990842 3990842 1971 Corvette Camaro Chevelle Smog Specs
Country of OriginUnited States
BrandGM
To Controltransmission
TypeSwitch Assembly
OE/OEM Part NumberLittlefuse Little Fuse 1971, 3990843
ColorSilver
Manufacturer Part Number3990842, 3990843
FeaturesDurable
Vintage PartYes
Universal FitmentNo
Placement on VehicleFront
Performance PartNo
Listing details

GM Transmission Spark Control (TSC) reversing relay, part number 3990842, and TSC, delay spark relay 3990843. Fits 1971 Chevrolet Corvette, Camaro, Chevelle, and similar models equipped with factory smog/AI​​R systems. Great for emissions restoration of 1971 GM vehicles. 80 Amp Relays. These are usually located on the gutter wire harness on the firewall. No box. Both tested and work great.