Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1966SUBURBAN 3.8L ENG VIN SREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE MECHANICALMECHANICALGENERAL MOTORS 4-CYL ENGINESENGINE IDENTIFICATION
1966 Chevrolet Suburban 3.8L Eng VIN S
Engine Identification
1966 Chevrolet Suburban 3.8L Eng VIN SSECTION Engine Identification
GENERAL SPECIFICATIONS
| Year | Displ. Cu. Ins. | Carburetor | HP at RPM | Torque (Ft. Lbs. at RPM) | Compr. Ratio | Bore | Stroke | ||
|---|---|---|---|---|---|---|---|---|---|
| 1965 | 194" | 1-Bbl. | 120@4400 | 177@2400 | 8.5:1 | 3.5625" | 3.250" | ||
| 230" | 1-Bbl. | 140@4400 | 220@1600 | 8.5:1 | 3.875" | 3.250" | |||
| 230"(1) | 1-Bbl. | 125@3400 | 210@1600 | 8.5:1 | 3.875" | 3.250" | |||
| 292" | 1-Bbl. | 165@3800 | 280@1600 | 8.0:1 | 3.875" | 4.120" | |||
| 1966 | 194" | 1-Bbl. | 120@4400 | 177@2400 | 8.5:1 | 3.5625" | 3.250" | ||
| 230" | 1-Bbl. | 140@4400 | 220@1600 | 8.5:1 | 3.875" | 3.250" | |||
| 250" | 1-Bbl. | 150@4200 | 210@1600 | 8.5:1 | 3.875" | 3.530" | |||
| 292" | 1-Bbl. | 170@4000 | 280@1600 | 8.0:1 | 3.875" | 4.120" | |||
| 1967-69 | 230" | 1-Bbl. | 140@4400 | 220@1600 | 8.5:1 | 3.875" | 3.250" | ||
| 250" | 1-Bbl. | 155@4200 | 235@1600 | 8.5:1 | 3.275" | 3.530" | |||
| 292" | 1-Bbl. | 170@4000 | 275@1600 | 8.0:1 | 3.875" | 4.120" | |||
| 1970 | 250" | 1-Bbl. | 155@4200 | 235@1600 | 8.5:1 | 3.875" | 3 530" | ||
| 292" | 1-Bbl. | 170@4000 | 275@1600 | 8.0:1 | 3.875" | 4.120" | |||
| 1971 | 250" | 1-Bbl. | 145@4200 | 230@1600 | 8.5:1 | 3.875" | 3.530" | ||
| 292" | 1-Bbl. | 165@4000 | 270@1600 | 8.0:1 | 3.875" | 4.120" | |||
| 1972 | 250" | 1-Bbl. | 110@3800 | 125@3600 | 8.5:1 | 3.875" | 3.530" | ||
| 292" | 1-Bbl. | 185@1600 | 225@2400 | 8.0:1 | 3.875" | 4.120" | |||
| 1973 | 250" | 1-Bbl. | 100@3600 | 120@3600 | 8.25:1 | 3.875" | 3.530" | ||
| 292" | 1-Bbl. | 175@2000 | 215@2000 | 8.0:1 | 3.875" | 4.120" | |||
| 1974 | 250" | 1-Bbl. | 100@3600 | 120@3600 | 8.25:1 | 3.875" | 3.530" | ||
| 292" | 1-Bbl. | 175@1800 | 215@2000 | 8.0:1 | 3.875" | 4.120" | |||
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NET HORSEPOWER & TORQUE NOTE - Horsepower and Torque figures given for 1972 and later are NET. NET Horsepower and Torque represent power at the flywheel when the engine is installed in the vehicle, with wide open throttle and all systems operating such as; air cleaner, exhaust system, water pump, generator, oil pump and air conditioning.
Engine code letters are suffix of Engine Identifications Number. Number is stamped on a pad, located at right side of cylinder block next to distributor.
1965 CHEVROLET
| Application | Code |
|---|---|
| 194" 6 Cyl. Man. Trans. | SG |
| 194" 6 Cyl. Auto. Trans. | SI |
| 230" 6 Cyl. Man. Trans. | TA, TG, TH, TJ |
| 230" 6 Cyl. Auto. Trans. | TE, TI, TK |
| 292" 6 Cyl. Man. Trans. | UH, UV |
| 292" 6 Cyl. Auto. Trans. | UT, UU |
1965 GMC
| Application | Code |
|---|---|
| 194" Man. Trans. | SCT, SJT |
| 194" Auto. Trans. | SIT |
| 230" Man. Trans. | TA, TG, TJ, TH, SKT, SMT |
| 230" Auto. Trans. | TE, TK, TI, SLT, SNT |
| 292" Man. Trans. | UH, UV, TO, UW |
| 292" Auto. Trans. | UT, UU |
1966 CHEVROLET
| Application | Code |
|---|---|
| 194" Man. Trans. | SG, SC |
| 194" Man. Trans. W/A.I.R. | SC, SD |
| 194" Auto. Trans. | SI, SF |
| 194" Auto. Trans. W/A.I.R. | SD, SP |
| 230" Man. Trans. | SK, TH |
| 230" Man. Trans. W/A.I.R. | SR, ST |
| 230" Auto. Trans. | TI |
| 230" Auto. Trans. W/A.I.R. | SS, SU |
| 250" Man. Trans. | TA, TJ, TF |
| 250" Man. Trans. W/A.I.R. | SV, SX |
| 250" Auto. Trans. | SL, TE, TK |
| 250" Auto. Trans. W/A.I.R. | SW |
| 292" Man. Trans. | UH, UV |
| 292" Man. Trans. W/A.I.R. | VQ |
| 292" Auto. Trans. | UT, UU |
| 292" Auto. Trans. W/A.I.R. | VR |
1966 GMC
| Application | Code |
|---|---|
| 194" Man. Trans. | SHT, SGT, SE |
| 194" Man. Trans. W/A.I.R. | SCT, SO |
| 194" Auto. Trans. | SJT, SIT, SF |
| 194" Auto. Trans. W/A.I.R. | SDT, SP |
| 230" Man. Trans. | SKT |
| 230" Man. Trans. W/A.I.R. | SRT, ST |
| 230" Auto. Trans. | SLT |
| 230" Auto. Trans. W/A.I.R. | SST, SU |
| 250" Man. Trans. | TA, TF, TJ |
| 250" Man. Trans. W/A.I.R. | SU, SX |
| 250" Auto. Trans. | SL, TE, TK |
| 250" Auto. Trans. W/A.I.R. | SW |
| 292" Man. Trans. | UH, UV |
| 292" Man. Trans. W/A.I.R. | VQ |
| 292" Auto. Trans. | UT, UU |
| 292" Auto. Trans. W/A.I.R. | VR |
1967 CHEVROLET
| Application | Code |
|---|---|
| 230" Man. Trans. | SK, TH |
| 230" Man. Trans. W/A.I.R. | SR, ST |
| 230" Auto. Trans. | SL, TI |
| 230" Auto Trans. W/A.I.R. | SS, SU |
| 250" Man. Trans. | SE, TA, TJ, TF, UC |
| 250" Man. Trans. W/A.I.R. | SF, SU, SX, UO |
| 250" Auto. Trans. | SO, TE, UC, UG |
| 250" Auto. Trans. W/A.I.R. | SP, SW, UN |
| 292" Man. Trans. | UH, UV |
| 292" Man. Trans. W/A.I.R. | VQ |
| 292" Auto. Trans. | UQ, UT, UU |
| 292" Auto. Trans. W/A.I.R. | UR |
1967 GMC
| Application | Code |
|---|---|
| 230" Man. Trans. | SK, Th |
| 230" Man. Trans. W/A.I.R. | SR, ST |
| 230" Auto. Trans. | SL, TI |
| 230" Auto Trans. W/A.I.R. | SS, SU |
| 250" Man. Trans. | SE, TA, TJ, TF, UC |
| 250" Man. Trans. W/A.I.R. | SF, SU, SX, UO |
| 250" Auto. Trans. | SO, TE, TK, UG |
| 250" Auto. Trans. W/A.I.R. | SP, SW, UN |
| 292" Man. Trans. | UH, UV |
| 292" Man. Trans. W/A.I.R. | VQ |
| 292" Auto. Trans. | UQ, UT, UU |
| 292" Auto. Trans. W/A.I.R. | TS, UR |
1968 CHEVROLET
| Application | Code |
|---|---|
| 230" Man. Trans. | PK, PR, PA |
| 230" Auto. Trans. | PL PU, PO |
| 250" Man. Trans. | TA, PV, PH, PI, PE |
| 250" Auto. Trans. | TE, TT, PW, PJ, TI |
| 292" Man. Trans. | UH, U3, UM |
| 292" Auto. Trans. | UT, UP, UO, UQ |
1968 GMC
| Application | Code |
|---|---|
| 230" Man. Trans. | PK, PA, PE, TF |
| 230" Man. Trans. W/A.I.R. | PK |
| 230" Auto. Trans. | PU, PO, TI, PW |
| 230" Auto. Trans. W/A.I.R. | PL |
| 250" Man. Trans. | PI, PV, TF |
| 250" Man. Trans. W/A.I.R. | PH, TA, PF |
| 250" Auto. Trans. | TB, PW |
| 250" Auto. Trans. W/A.I.R. | PJ, TE |
| 292" Man. Trans. | UM |
| 292" Man. Trans. W/A.I.R. | UH |
| 292" Auto. Trans. | UO, UQ |
| 292" Auto. Trans. W/A.I.R. | UT, UP |
1969 CHEVROLET
| Application | Code |
|---|---|
| 230" Man. Trans. | OA |
| 230" Auto. Trans. | QN, QL, OB, OD |
| 250" Man. Trans. | PB, PC, PE, PK, PL, PP, PQ, OS, OT |
| 250" Auto. Trans. | PD, PM, PO, PW, PX OO, OV, OX, OZ |
| 292" Man. Trans. | RE, RG, RS |
| 292" Auto. Trans. | RR, RA, RB, RC, RD, RQ |
1969 GMC
| Application | Code |
|---|---|
| 230" Man. Trans. | OA, OM |
| 230" Man. Trans. W/A.I.R. | OK |
| 230" Auto. Trans. | OB, ON |
| 230" Auto. Trans. W/A.I.R. | OL |
| 250" Man. Trans. | PA, PL, PK |
| 250" Man. Trans. W/A.I.R. | PC, PP |
| 250" Auto. Trans. | PX, PM |
| 250" Auto. Trans. W/A.I.R. | PE, PW |
| 292" Man. Trans. | RE |
| 292" Man. Trans. W/A.I.R. | RS, RG |
| 292" Auto. Trans. | RA, RB |
| 292" Auto. Trans. W/A.I.R. | RR, RD, RQ |
1970 CHEVROLET
| Application | Code |
|---|---|
| 250" Man. Trans. | TAA, TAB, TCN, TCK |
| 250" Man. Trans. LP. Gas | TCE, TNR, TCC |
| 250" Auto. Trans. | TAC, TAD, TNX, TCA, TCB, TNW |
| 250" Auto. Trans. LP. Gas | TCF, TCG, TCI, TCM |
| 292" Man. Trans. | TCZ, TNA |
| 292" Man. Trans. LP. Gas | TND |
| 292" Auto. Trans. | TAG, TCU, TAF |
| 292" Auto. Trans. LP. Gas | TNC, TNE |
1970 GMC
| Application | Code |
|---|---|
| 250" Man. Trans. | TCN, TCC, TAB, TCK |
| 250" Auto. Trans. | TNW, TNX, TCB, TCA, TAC, TAD, TAC |
| 292" Man. Trans. | TNA |
| 292" Auto. Trans. | TCU, TAF, TAG |
1971 CHEVROLET
| Application | Code |
|---|---|
| 250" Man. Trans. | TPT, TPW, TPR, TKH, TPD, TPL, TKD, TRB, TPJ, TBB |
| 250" Man. Trans. LPG | TPX, TKJ |
| 250" Auto. Trans. | TPY, TPS, TKK, TPH, TKG, TPK |
| 292" Man. Trans. | TKL |
| 292" Man. Trans. LPG | TKP |
| 292" Auto. Trans. | TKR, TKS |
1971 GMC
| Application | Code |
|---|---|
| 250" Man. Trans. | TCG, TCL, TLG, TLH, TCD |
| 250" Auto. Trans. | TCK, TCT, TCS, TLC |
| 250" LPG | TCP |
| 292" Man. Trans. | TGA |
| 292" Auto. Trans. | TGB, TGD |
| 292" LPG | TGC, TGG |
1972 CHEVROLET & GMC
| Application | Code |
|---|---|
| 250" Man. Trans. | TPT, TPW, TPR, TKH, TPD, TPL, TKD, TRB, TPJ, TBB |
| 250" Man. Trans. LPG | TPX, TKJ |
| 250" Auto. Trans. | TPY, TPS, TKK, TPH, TKG, TPK |
| 292" Man. Trans. | TKL |
| 292" Man. Trans. LPG | TKP |
| 292" Auto. Trans. | TKR, TKS |
1973 CHEVROLET & GMC
| Application | Code |
|---|---|
| 250" Man. Trans. | TAJ, TAT, TAX, TAY, TAM, TBA, TBH, TBJ, TAB, TBM TAC, TAD, TAH, TAK, TAL |
| 250" Auto. Trans. | TAA, TBL, TAJ, TAS, TAW, TAR, TAZ, TBL, TBC |
| 292" Man. Trans. | TRC, THC, THD, THL |
| 292" Auto. Trans. | THA, THB, THH, THJ |
1974 CHEVROLET & GMC
| Application | Code |
|---|---|
| 250" Man. Trans. | TAB, TAC, TAD, TAH, TAK, TAL, THM, TAT, TAU, TBA, TBX, TBK, TBH |
| 250" Auto. Trans. | TAJ, TBL, TAR, TAS, TAW, TAA, TAZ, TBC, TBD |
| 250" LPG | TBM |
| 292" Man. Trans. | THU, THW |
| 292" Auto. Trans. | THS, THT |
| 292" LPG | THD |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.