For 1990-2009 cars

# SPARK PLUG AND GAP CLARIFICATION & SPECIFICATIONS

#### VEHICLES AFFECTED: All 1981-1985 Models

The following information is being supplied to clarify any confusion about recommended spark plugs and their appropriate gaps.

YEAR ENGINE VIN CODE SERIES SPARK PLUG GAP ---- ------ -------- ------ ----------- ---- 1981 1.6L 9 T R42TS .035 IN 2.5L 5 X R44TSX .060 IN 2.8L X X R43TS .045 IN 3.8L A A,B,F R45TS8 .080 IN 4.3L S A,B,F R45TSX .060 IN 4.9L W,S A,F R45TSX .060 IN 4.9L Turbo T F R45TSX .060 IN 5.0L Y B R46SX .080 IN 5.0L H F R45TS .045 IN 5.7L 6 Y R45TS .045 IN 1982 1.6L C T R42TS .035 IN 1.8L 2BBL G J *R42CTS .035 IN 1.8L EFI O J *R44XLS .035 IN 2.5L EFI R,2 A,F,X R44TSX .060 IN 2.8L X,1 A,F,X *R43CTS .045 IN 2.8L 2 A,F,X R42CTS .045 1N 3.8L A G R45TS8 .080 IN 4.1L 4 G R45TS8 .080 IN 5.0L 4BBL H F R45TS .045 IN 5.0L CFI 7 F R45TS .045 IN 5.7L 8 Y R45TS .045 IN

1983 1.6L C T *R42CTS .035 IN 1.8L EFI O J *R44XLS .035 IN 2.0L EFI P J R42CTS .035 IN 2.5L EFI R,2 A,F,X *R44TSX .060 IN 2.8L L,X,1 A,F,X R43CTS .045 IN 2.8L H.O. Z X R42CTS .045 IN 3.8L A G R45TS8 .080 IN 3.8L 9 B R45TS .045 IN 5.0L 4BBL H G,F,B R45TS .045 IN 5.0L CTI S F R45TS .045 IN 5.0L H.O. 7 F R42CTS .045 IN 5.7L 8 Y R45TS .045 IN

1984 1.6L C T R42CTS .035 IN 1.8L EFI O J R44XLS .035 IN 1.8L Turbo J J R42CXLS .035 IN 2.0L EFI P J R42CTS .035 IN 2.5L EFI R,2 A,F,P,X *R43TSX .060 IN 2.8L H.O. Z,L A,F,X R42CTS .045 IN 2.8L X,1 A,F,X R43CTS .045 IN 3.8L A B,G R45TSX .060 IN 5.0L H B,F,G R45TS .045 IN 5.0L H.O. G F R44TS .045 IN 5.7L 8 Y R45TS .045 IN

1985 1.6L C T R42CTS .035 IN 1.8L EFI O J R44XLS .035 IN 1.8L Turbo J J R42CXLS .035 IN 2.5L EFI R,2,U A,F,P,N R43TSX .060 IN 2.8L 2bbl X A R43CTS .045 IN 2.8L MFI 9,W,S A,F,P R42CTS .045 IN 3.0L MFI L N R44LTS .040 IN 3.8L A G R45TSX .060 IN 4.3L EFI Z B R43CTS .035 IN 5.0L 4bbl H B,F,G R45TS .045 IN 5.0L H.O. G F R44TS .045 IN 5.0L TPI F F R43CTS .045 IN 5.7L TPI 8 Y R43CTS .045 IN 5.7L 6 B R44TS .045 IN

* Revised from original specifications.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.