The timing should be set at top dead center (tdc)@ idle r.p.m
(Shopkey5)
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Depending on the computer in the vehicle, you may need to disconnect the ECM plug on the distributor before doing this, and then reset the ECM trouble code afterwords. Consult the shop manual for details, because I'm not certain. In all probability, if there are two plugs on the distributor, one of two wires and one of four wires, the ECM connector is the one with four wires.
R1500=2wd v1500=4wd
K is 4x4
APPLICATIONSMakeModelYearsEngineBuickCentury1982-882.8L / 4.3L Electra / Park Avenue19854.3L Regal1982-932.8L / 3.1L / 4.3L Roadmaster1994-965.7L Skyhawk1982-891.8L / 2.0L Skylark1980-84173 / 2.0L / 2.8LCadillacCimarron1982-861.8L / 2.0L Commercial Chassis / Eldorado / Funeral Coach / Limousine19854.3L DeVille / Fleetwood / Sixty Special19854.1L / 4.3LCadillac TruckEscalade1999-005.7LCheckerMarathon Taxicab1981-82229ChevroletBeretta / Corsica1987-912.0L / 2.2L Camaro1981229 Camaro1989-922.8L / 3.1L Caprice1981-96229 / 3.8L / 4.3L / 5.7L Cavalier1982-911.8L / 2.0L / 2.2L Celebrity1982-902.8L / 3.1L / 4.3L Citation1980-83173 / 2.8L Corvette1992-965.7L Impala1981-85229 / 3.8L / 4.3L Impala1994-964.3L / 5.7L Lumina1990-973.1L / 3.4L Malibu1981-83229 / 3.8L / 4.3L Monte Carlo1981-88229 / 3.4L / 3.8L / 4.3L Monte Carlo1996-973.4LGM TruckAstro1984-994.3L Astro / Safari20014.3L Blazer1991-945.7L Blazer1997-054.3L C10-35 / G10-35 Van1985-864.3L C1500-35001988-994.3L Cabellero / El Camino / Sprint1981-87229 / 260 / 3.8L / 4.3L Envoy2000-014.3L Express1998-004.3L G1500-3500 Van1987-004.3L Jimmy1982-022.8L / 4.3L / 5.7L Jimmy (Canada)2003-044.3L K10-351985-914.3L / 5.0L / 5.7L K1500-35001992-994.3L / 5.0L / 5.7L K2500-350020005.0L / 5.7L Lumina APV1990-943.1L P2500-3500 Delivery Van1990-994.3L / 5.7L R1500-3500 / V1500-350019874.3L S102000-042.2L / 4.3L S10 / T10 1982-992.8L / 4.3L S10-T10 Blazer / S15-T15 Jimmy1991-962.8L / 4.3L S15 / T151997-994.3L S15 / T15 Blazer1982-902.8L / 4.3L Safari1985-994.3L Savana1998-994.3L Sierra 1500-35002000-024.3L / 5.7L Silverado 1500-35001999-024.3L Sonoma1991-042.2 L / 2.8L / 4.3L Suburban 2WD1985-874.3L Suburban 2WD1992-994.3L Suburban 4WD1985-994.3L / 5.0L / 5.7L Tahoe1995-015.7L XL Denali / Yukon / Yukon XL 1500-25002000-014.3L / 5.7L Yukon / Denali1995-995.7LIsuzu TruckHombre1996-004.3LOldsmobileCutlass Calais1982-854.3L Cutlass Cierra1982-892.8L / 4.3L Cutlass Supreme1982-892.8L / 3.1L / 3.4L / 4.3L Firenza1982-881.8L / 2.0L Ninety-Eight19854.3L Omega1980-83173 / 2.8LOldsmobile TruckBravada1991-014.3L Silhouette APV1990-943.1LPontiac60001982-912.8L / 3.1L / 4.3L Bonneville / Commerical Chassis1985-864.3L Fiero1984-882.5L / 2.8L Firebird1988-922.8L / 3.1L Grand Lemans / Lemans1981229 Grand Prix1986-962.8L / 3.1L / 3.4L / 4.3L J20001982-841.8L / 2.0L Parisienne1983-863.8L / 4.3L Phoenix1980-83173 / 2.8L Sunbird1985-862.0L Tempest (Canada)1987-912.0L / 2.2LPontiac TruckTrans Sport APV1990-943.1L