SERVICE REPLACEMENT TRANSMISSION ASSEMBLY UPDATE. GMC Truck GMC G Van 1983

VEHICLE APPLICATIONS:

ALL

Bulletin Covers:

This bulletin expands the list for all SRTA model applications. The SRTA Model Replacement Charts (refer to Figures 1-5) offer a complete list of the 1982 through 1988 SRTA models offered by Hydra-matic.

SRTA ADVANTAGES:

- A SRTA is the product of a highly successful, customer satisfaction driven program providing the technician with a service alternative when addressing diagnostic and overhaul concerns.

- All SRTA units are designed and remanufactured to current engineering specifications and are often less costly than major overhaul.

In the interest of customer satisfaction, SRTA models should only be considered when the projected cost of repair exceeds the cost of a SRTA replacement.

SERVICE NOTE:

Cooler flushing must be performed whenever a transmission/transaxle is removed for service. It is essential to flush the cooler after SRTA installation, major overhaul, in any case of pump or torque converter replacement, or when fluid contamination is suspected. Time allowance has been added to operation K7000 (Trans R&R) for 1987 and 1988 models. Add 0.6 hours to R&R allowances for 1982 through 1986 models.

The THM 125C transaxle has been added to the SRTA program. However, due to low projected Canadian sales volumes, 125C SRTA models will not be stocked in Canada and will only be imported as required. Further, there will be no provision for returning cores or recovering core changes. The cost of a 125C SRTA will be less than that for a new assembly.

The THM 200C transmission will also be added to the SRTA Program as GMSPO depletes its stock of original equipment units. Currently the 1987 THM 200C KBB model is available as a "7KB" SRTA unit. All other THM 200C models will be superseded by the appropriate SRTA model on an "as needed" basis. OEM part numbers will be superseded automatically with the appropriate SRTA number.) Some THM 200C content will be updated to current engineering specifications, The remaining components will be remanufactured to the applicable OEM standards at time of original production,

SERVICE PARTS INFORMATION:

THM 200C SRTA Model Part Number Original Transmission Model ------------------- ----------- --------------------------- 7KB 8638983 1987 KBB

Figure 1 - 1982-1986 THM 125C SRTA Model Replacement Chart NOTE: Part numbers are accurate at time of printing and subject to change.

SRTA PART DESCRIPTION ORIGINAL TRANSAXLE MODEL YEAR AND MODEL MODEL NUMBER 1982 1983 1984 1985 1986

2C3 8660953 1.8L J-CAR 2C3 -- -- -- -- 2CJ 8660952 1.8L J-CAR 2CJ -- -- -- -- 2HC 8660954 1.8L J-CAR 2HC,2HI -- -- -- -- 2HY 8660955 1.8L J-CAR 2HU,2HY -- -- -- -- 3BF 8660935 3.0L A-CAR 2BF 3BF -- -- -- 3BL 8660936 3.0L A-CAR 2BL 3BL -- -- -- 3CA 8660937 2.0L J-CAR -- 3CA -- -- -- 3CB 8660938 1.8L/2.0L J-CAR 2CI,2CU 3CB -- -- -- 3CC 8660939 2.8L A/X-CAR -- 3CC,3CD -- -- -- 3CE 8660957 2.8L X-CAR 2CE 3CE -- -- -- 3CF 8660940 1.8L/2.0L J-CAR 2CF 3CF -- -- -- 3CL 8660941 2.8L A/X-CAR 2CL 3CL -- -- -- 3CT B660942 2.8L A/X-CAR 2CT 3CK,3CT -- -- -- 3HC 8660947 1.8L/2.OL J-CAR 2HR 3HC -- -- -- 3HD 8660948 2.8L X-CAR 2CD 3HD -- -- -- 3HS 8660949 2.8L A-CAR 2HS 3HS -- -- -- 3HW 8660950 2.5L A/X-CAR 2H6 3HW -- -- -- 3HY 8660951 2.8L J-CAR -- 3HY -- -- -- 3OP B660958 4.3L DIESEL A-CAR 20P 30P -- -- -- 3P3 8660946 1.8L J-CAR 2P3 3P3 -- -- -- 3PD 8660943 2.5L A/X-CAR 2PD,2PI 3PD -- -- -- 3PG 8660944 1.8L J-CAR 2PG 3PG -- -- -- 3PW 8660945 2.5L A/X-CAR 2PW,2PL 3PW -- -- -- 4CC 8660931 2.8L A-CAR -- -- 4CC -- -- 4HC 8660932 2.0L J-CAR -- -- 4HC 5H4 -- 4HY 8660933 2.0L J-CAR -- -- 4HY 5H3 -- 4OP 8660934 4.3L DIESEL A-CAR -- -- 40P -- -- 5BF 8660926 3.0L A-CAR -- -- 4BF 5BF -- 5BL 8660927 3.0L A-CAR -- -- 4BL 5BL -- 5C2 8660929 2.0L J-CAR -- -- 4CF 5C2 -- 5CE 8660928 2.8L X-CAR -- -- 4CE 5CE -- 5OP 8660930 4.3L DIESEL A-CAR -- -- -- 5OP -- 6BA 8660908 3.0L N-CAR -- -- -- -- 6BAC,6BCC 6CA 8660910 2.0L/2.8L J-CAR -- -- 4CA 5C4,5CA,5CC 6CAC,6CCC 6CB 8660911 2.0L/2.8L J-CAR -- -- 4CB 5C3,5CB,5CI 6CBC,6CMC 6CD 8660912 2.8L P-CAR -- -- -- 5CD 6CDC 6CJ 8660913 2.8L J-CAR -- -- -- 5CJ 6CJC 6CK 8660914 2.8L A/X-CAR -- -- 4CI,4CK 5CK 6CKC 6CL 8660915 2.8L A/X-CAR -- -- 4CL 5CL 6CLC 6CX 8660917 2.8L A/STE/X-CAR -- -- -- 5CU,5CX 6CUC,6CXC 6HS 8660924 2.8L A/X-CAR -- -- 4HS 5HS 6HSC 6HU 8660925 2.8L A-CAR -- -- 4HV 5HV 6HUC 6PA 8660918 1.8L J-CAR -- -- 4PJ 5P2,5P5,5PJ 6PAC,6PJC 6PD 8660919 2.5L A-CAR -- -- 4PD 5PD 6PDC 6PF 8660956 2.5L P-CAR -- -- 4PF 5PF 6PFC 6PH 8660920 1.8L J-CAR -- -- 4PE 5P4,5PE 6PHC,6PRC 6PK 8660921 1.8L J-CAR -- -- 4PG 5P3,5PG 6PKC 6PW 8660923 2.5L A/X-CAR -- -- 4PW 5PW 6PWC 7BD 8664966 3.OL N-CAR -- -- -- -- 6BDC 7BP 8664952 3.OL N-CAR -- -- -- -- 6BK 7CP 8664927 2.8L P-CAR -- -- -- -- 6CPC 7CT 8664938 2.8L A/X-CAR -- -- -- 5CT 6CTC 8PN 8664955 2.5L N-CAR -- -- -- 5PN 6PN

Figure 2 - 1987-1988 THM 125C SRTA Model Replacement Chart NOTE: Part Numbers are accurate at time of printing and subject to change.

SRTA PART ORIGINAL TRANSAXLE MODEL YEAR AND MODEL MODEL NUMBER DESCRIPTION 1987 1988 ----- ------ ----------- ---- ---- 7CS 8664933 2.0L L-CAR 7CSC -- 7CT 8664938 2.8L A-CAR 7CTC -- 7CU 8664967 2.8L L-CAR 7CUC -- 7CX 8664937 2.8L A-CAR 7CXC -- 7PD 8664953 2.5L A-CAR 7PDC -- 7PH 8664968 2.0L J-CAR 7PHC,7PFC -- 7PS 8664929 2.5L P-CAR 7PSC -- 8BH 8664928 3.0L N-CAR 7BHC 8BHC 8BJ 8664946 3.0L N-CAR 7BJC 8BJC 8CB 8664932 2.0L J-CAR 7CBC,7CMC, 8CBC,8CMC 7CRC 8CJ 8664934 2.8L J-CAR 7CJC 8CJC 8CP 8664978 2.8L P-CAR -- 8CPC 8CR 8664949 2.0L L-CAR -- 8CRC 8CT 8664943 2.8L A-CAR -- 8CTC,8LSC 8CU 8664941 2.8L L-CAR -- 8CUC 8KC 8664947 2.3L N-CAR -- 8KCC 8KD 8664945 2.3L N-CAR -- 8KDC 8PK 8664936 2.0L J-CAR 7PKC 8PKC,8TRC 8PM 8664930 2.0L N-CAR 7PMC 8PMC 8PN 8664955 2.5L N-CAR 7PNC 8PNC 8PP 8664950 2.0L J-CAR 7PPC,7POC 8PCC 8PR 8664942 2.0L T-CAR -- 8PRC 8PS 8664940 2.5L P-CAR -- 8PSC 8PT 8664931 1.6L T-CAR 7PTC 8PTC 8PZ 8664979 2.5L A-CAR -- 8PZC,8PDC 8TN 8664944 2.8L J-CAR -- 8TNC

Figure 3 - 1984-1986 THM 440-T4 SRTA Model Replacement Chart NOTE: Part numbers are accurate at time of printing and subject to change.

SRTA PART DESCRIPTION ORIGINAL TRANSAXLE MODEL YEAR AND MODEL MODEL NUMBER 1984 1985 1986

5BV 8658902 3.0L A/C-CAR -- 5BS,5BU, -- 5BM,5BN 5BW 8658903 3.8L A/C-CAR 4BC 5BA,5BC,5BR, -- 5BX,5BW 50B 8658908 4.3L DIESEL A/C-CAR -- 50B -- 50Y 8658909 4.3L DIESEL A/C-CAR -- 50Y -- 6BHH 8658920 3.0L H-CAR -- -- 6BHH 6CFH 8658928 2.8L HO A-CAR 4CW 5CW,5CP, 6CFH,6CMH, 5CM,5CN 6CNH 6FBH 8658988 3.8L H-CAR -- -- 6BBH,6FBH 6BAH,6BCH, 6FCH 8658989 3.8L A/C/H-CAR -- -- 6BDH,6BLH, 6BMH,6BSH, 6FCH

6FTH 8658991 3.8L C-CAR -- -- 6BTH,6FTH 6FYH 8658993 3.8L E-CAR T-TYPE -- -- 6BYH,6FYH 6FZH 8658992 3.8L E-CAR -- -- 6BZH,6FZH 6HJH 8658927 2.8L A-CAR (CANADA) -- 5HA,5HJ,5HT 6HBH,6HJH 7ACH 8658941 4.1L C-CAR TOURING -- -- 6ACH,6AWH 7ADH 8658942 4.1L E/K-CAR (EXPORT) -- -- 6ADH,6ATH 7AHH 8658944 4.1L E/K-CAR -- -- 6AAH,6ABH, 6AXH,6AYH 6AFH,6AJH, 7ALH 8658945 4.1 L C-CAR & LIMO -- 5AF,5AM,5AY 6AMH,6APH, 6ASH 7ARH 8658946 4.1L C-CAR (EXPORT) -- 5AR 6ANH,6ARH

Figure 4 - 1987-1988 THM 44O-T4 SRTA Model Replacement Chart NOTE: Part numbers are accurate at time of printing and subject to change.

SRTA PART ORIGINAL TRANSAXLE MODEL YEAR AND MODEL MODEL MODEL DESCRIPTION 1987 1988 ----- ----- ----------- ---- ---- 7ACH 8658941 4.lL C-CAR TOURING 7ACH -- 7ADH 8658942 4.lL EIK-CAR (EXPORT) 7ADH -- 7AHH 8658944 4.lL EIK-CAR 7AHH -- 7ALH 8658945 4.1L C-CAR & LIMO 7ALH -- 7ARH 8658946 4.lL C-CAR (EXPORT) 7ARH -- 7CAH 8658957 2.8L HO A-CAR 7CAH -- 7CBH 8658987 2.8L A-CAR STE 7CBH -- 7FBH 8658947 3.8L G/H-CAR 7FBH,7FKH -- 7FCH 8658948 3.8L A-CAR 7FCH,7FLH -- 7FNH 8658951 3.8L C/H-CAR T-TYPE 7FNH -- 7FRH 8658952 3.8L E-CAR T-TYPE 7FRH -- 7FSH 8658953 3.8L H-CAR (EXPORT? 7FSH -- 7FTH 8658954 3.8L C-CAR 7TH,7FJH -- 7FZH 8658956 3.8L E-CAR 7FZH -- 7HAH 8658958 3.8L H-CAR (CANADA) 7HAH -- 7HCH 8658959 3.8L H-CAR T (CANADA) 7HCH -- 8AAH 8668900 4.5L C-CAR -- 8AAH 8ABH 8668901 4.5L E/K-CAR -- 8ABH 8AFH 8668902 4.5L C-CAR LIMO -- 8AFH 8AJH 8668923 4.5L E/K TOURING -- 8AJH 8ANH 8668903 4.5L C-CAR (EXPORT) -- 8ANH 8ATH 8668904 4.5L E/K-CAR (EXPORT) -- 8ATH 8BJH 8668906 3800 H-CAR -- 8BJH 8BKH 8668907 3800 C/H-CAR -- 8BKH 8BRH 8668908 3800 E-CAR T-TYPE -- BBRH 8BTH 8668909 3800 C/H-CAR T-TYPE -- 8BTH 8BYH 8668911 3800 E-CAR -- 8BYH 8CFH 8668912 2.8L MPFI A-CAR STE -- 8CFH 8CMH 8668913 2.8L MPFI A-CAR -- 8CMH 8CRH 8668914 2.8L MPFI W-CAR -- 8CRH 8CTH 8668915 2.8L MPFI W-CAR -- 8CTH 8CWH 8668916 2.8L MPFI A-CAR -- 8CWH 8CXH 8668922 2.8L MPFI A-CAR -- 8CXH 8FBH 8668917 3.8L SFI H-CAR -- 8FBH 8FGH 8668918 3.8L SFI A-CAR -- 8FCH 8FJH 8668919 3.8L SFI H-CAR T-TYPE -- 8FJH 8FSH 8668921 3.8L SFI C-CAR (EXPORT) -- 8FSH

Figure 5 - 1982-1986 THM 700-R4 SRTA Model R NOTE: Part numbers are accurate at time of printing and subject to change.

ORIGINAL TRANSMISSION MODEL YEAR SRTA PART MODEL NUMBER DESCRIPTION 1982 1983 1984 ----- ------ ----------- ---- ---- ---- 2M2 8654957 4.1L K-Truck 9M2,9TC 3TC 4TC 2Y4 8654911 4.4L B-CAR 9Y4,9Yl -- -- 2Y6 8659907 5.7L Y-CAR 9YA,9Y6 -- -- 3ME 8659920 5.OL/5.7L C/G-TRUCK (CALIF.) -- 3ME,3TE -- 3YG B654934 5.OL TBI F-CAR -- 3YG -- 4MB 8659910 4.lL C-TRUCK (CALIF.) -- 3MB,3VN 4MB,4VN 4MJ 8659909 4.lL C/G-TRUCK 9MB,9MC, 3MC,3MJ 4MC,4MJ 9TW,9T6 4VA 8659908 2.OL S-TRUCK -- 3T2,3VA 4VA 4Y7 8659902 2.8L F-CAR -- -- 4Y7 4YF 8659965 2.8L F-CAR -- 3YF 4YF 5MG 8659968 6.2L DIESEL C-TRUCK -- -- 4MG,4VE,4VX 5ML 8647929 2.8L S-TRUCK -- 3ML 4ML 5MP 8659966 2.8L S-TRUCK (CALIF.) 3MP 4MP 5MS 8659967 2.8L T-TRUCK (CALIF) -- 3MS 4MS 5T7 8647931 2.8L T-TRUCK -- 3T7 4T7 5TM 8659923 6.2L DIESEL K-TRUCK (CALIF.) -- -- 4TM 5VK 8659913 4.3L M-VAN -- -- -- 5VL 8659914 4.3L M-VAN (CALIF.) -- -- -- 6FA 8649947 4.3L M-VAN (CALIF.) -- -- -- 6MC 8649905 2.5L M-VAN -- -- -- 6MD 8659918 5.OL/5.7L C/G-TRUCK 9TE,9ME,9TJ 3MD, 4MD,4MK,4VH 9M7,9T5,9MD 3MK,3VH 6MH 8659922 6.2L DIESEL C-TRUCK 9MH,9TN 3MH,3TL,3VJ 4MH,4TL,4VJ 6MM 8659912 4.3L C-TRUCK (CALIF.) -- -- -- 6MR 8659915 4.3L K-TRUCK -- -- -- 6MT 8649904 2.5L T-TRUCK -- -- -- 6MX 8659911 4.3L C-TRUCK -- -- -- 6MW 8659921 5.7L K-TRUCK (CALIF.) -- 3MW 4MW 6PL 8659900 2.5L F-CAR -- 3PQ 4PQ 6PR 8649903 2.5L S-TRUCK -- -- -- 6TA 8649907 2.8L T-TRUCK (CALIF.) -- -- -- 6TB 8649906 2.8L S-TRUCK (CALIF.) -- -- -- 6TC 8659917 5.0L C-TRUCK (CANADA) -- -- 4TG,4MR 6TD 8649901 5.0L/5.7L K-TRUCK (CANADA) -- -- 4TD 6TJ 8659919 5.0L/5.7L C/G-TRUCK (CALIF.) -- -- 4ME,4TE 6TK 8649921 5.0L/5.7L K-TRUCK 9M4,9TH, 3TH,3TK 4TH,4TK 9M5,9TK 6TR 8649929 6.2L DIESEL K 9M6,9TP 3TP,3TS, 4T8,4TZ 3T8,3TZ 6TS 8659905 5.7L B-CAR (POLICE-CANADA) -- -- 4TS 6TW 8659916 4.3L K-TRUCK (CALIF.) -- -- -- 6YC 8659906 5.7L MPFI Y-CAR -- 3Y9 4YA,4Y9,4YW

6YF 8649942 5.0L F-CAR (CANADA) -- -- 4Y8 6YK 8649934 5.0L B-WAGON 9Y3,9YK 3YK 4YK 6YL 8649936 5.0L B-CAR (CANADA) -- -- 4Y6 6YN 8659904 5.7L B-CAR (POLICE) -- 3YN 4YN 6YP 8649940 5.0L F-CAR -- 3YP 4YP 6YT 8649933 4.3L B-CAR -- -- -- 6YW 8659903 5.0L MPFI F-CAR -- -- 4YG

6YX 8659901 2.8L MPFI F-CAR -- 3YH 4YH

SRTA PART MODEL NUMBER DESCRIPTION 1985 1986 ----- ------ ----------- ---- ---- 2M2 8654957 4.1L K-Truck -- -- 2Y4 8654911 4.4L B-CAR -- -- 2Y6 8659907 5.7L Y-CAR -- -- 3ME 8659920 5.OL/5.7L C/G-TRUCK (CALIF.) -- -- 3YG B654934 5.OL TBI F-CAR -- -- 4MB 8659910 4.lL C-TRUCK (CALIF.) -- -- 4MJ 8659909 4.lL C/G-TRUCK -- --

4VA 8659908 2.OL S-TRUCK -- -- 4Y7 8659902 2.8L F-CAR -- -- 4YF 8659965 2.8L F-CAR -- -- 5MG 8659968 6.2L DIESEL C-TRUCK 5MG, 5VE -- 5ML 8647929 2.8L S-TRUCK 5ML -- 5MP 8659966 2.8L S-TRUCK (CALIF.) 5MP -- 5MS 8659967 2.8L T-TRUCK (CALIF) 5MS -- 5T7 8647931 2.8L T-TRUCK 5T7 -- 5TM 8659923 6.2L DIESEL K-TRUCK (CALIF.) 5TM -- 5VK 8659913 4.3L M-VAN 5VK -- 5VL 8659914 4.3L M-VAN (CALIF.) 5VL -- 6FA 8649947 4.3L M-VAN (CALIF.) -- 6FAM 6MC 8649905 2.5L M-VAN 5VC 6MCM 6MD 8659918 5.OL/5.7L C/G-TRUCK 5MD,5MK,5VH 6MDM,6MKM

6MH 8659922 6.2L DIESEL C-TRUCK 5MH,5TL,5VJ 6MHM,6TNM 6MM 8659912 4.3L C-TRUCK (CALIF.) 5MM,5VG 6MAM,6MMM 6MR 8659915 4.3L K-TRUCK 5VZ 6MRM 6MT 8649904 2.5L T-TRUCK 5MT 6MTM 6MX 8659911 4.3L C-TRUCK 5MX,5VF 6MFM,6MXM 6MW 8659921 5.7L K-TRUCK (CALIF.) 5MW 6MWM 6PL 8659900 2.5L F-CAR 5PQ 6PLM 6PR 8649903 2.5L S-TRUCK 5PR 6PRM 6TA 8649907 2.8L T-TRUCK (CALIF.) -- 6TAM 6TB 8649906 2.8L S-TRUCK (CALIF.) -- 6TBM 6TC 8659917 5.0L C-TRUCK (CANADA) 5TG,5MR 6TCM,6TFM 6TD 8649901 5.0L/5.7L K-TRUCK (CANADA) 5TD 6TDM 6TJ 8659919 5.0L/5.7L C/G-TRUCK (CALIF.) 5ME,5TE 6MPM,6TJM 6TK 8649921 5.0L/5.7L K-TRUCK 5TH,5TK 6TKM

6TR 8649929 6.2L DIESEL K 5TB,5TZ 6TRM

6TS 8659905 5.7L B-CAR (POLICE-CANADA) 5TS 6TSM 6TW 8659916 4.3L K-TRUCK (CALIF.) 5TW 6TWM 6YC 8659906 5.7L MPFI Y-CAR 5YA,5YC,5YD 6YAM,6YCM 6YDM 6YF 8649942 5.0L F-CAR (CANADA) 5Y8 6YFM 6YK 8649934 5.0L B-WAGON 5YK 6YKM 6YL 8649936 5.0L B-CAR (CANADA) 5Y6 6YLM 6YN 8659904 5.7L B-CAR (POLICE) 5YN 6YNM 6YP 8649940 5.0L F-CAR 5YP 6YPM 6YT 8649933 4.3L B-CAR 5YT 6YTM 6YW 8659903 5.0L MPFI F-CAR 5YZ 6YSM,6YWM 6YZM 6YX 8659901 2.8L MPFI F-CAR 5YX 6YXM

Figure 6 - 1987-1988 THM 700-R4 SRTA Model Replacement Chart NOTE: Part numbers are accurate at time of printing and subject to change.

SRTA PART ORIGINAL TRANSMISSION MODEL YEAR AND MODEL MODEL NUMBER DESCRIPTION 1987 1988

7TN 8648930 6.2L DIESEL R/G-TRUCK 7MHM,7TNM -- 7TR 8648931 6.2L DIESEL K/V-TRUCK 7TRM -- 7TS 8648932 5.7L B-CAR (POLICE) 7TSM -- 7YA 8648935 5.7L Y-CAR 7YAM -- 7YF 8648937 5.0L F-CAR (CANADA) 7YFM -- 7YL 8648939 5.0L B-CAR (CANADA) 7YLM -- 7YP 8648942 5.0L F-CAR 7YPM -- 7YS 8648943 5.0L F-CAR 7YSM -- 8FA 8663900 4.3L M-VAN (CALIF.) 7FAM 8FAM 8FM 8663901 4.3L M-VAN -- 8FMM 8MA 8663902 4.3L R/G-TRUCK(CALIF.) 7MAM,7MMM 8MAM 8MC 8663903 2.5L M-VAN 7MCM 8MCM 8MF 8663905 4.3L C-TRUCK 7MFM,7MXM 8MFM,8MXM 8MK 8663907 5.0L C-TRUCK 7MDM,7MKM 8MDM,8MKM 8ML 8663908 5.0L C-TRUCK 7MLM 8MLM 8MP 8663909 5.7L C-TRUCK (CALIF.) 7MPM,7MZM 8MPM,8MZM 8MR 8663910 4.3L K/V-TRUCK 7MRM 8MRM 8MT 8663911 2.5L T-TRUCK 7MTM 8MTM 8PB 8663916 6.2L DIESEL C-TRUCK 7PAM,7PBM 8PAM,8PBM 8PC 8663917 6.2L DIESEL K-TRUCK 7PCM 8PCM 8PR 8663918 2.5L S-TRUCK 7PRM 8PRM 8TA 8663919 2.8L T-TRUCK (CALIF.) 7TAM 8TAM 8TB 8663920 2.8L S-TRUCK (CALIF.) 7TBM 8TBM 8TH 8663921 4.3L T-TRUCK -- 8THM 8TJ 8663922 5.0L R/G-TRUCK(CALIF.) 7MUM,7TJM 8TJM 8TK 8663923 5.0L K/V-TRUCK 7TKM 8TKM 8TL 8663924 4.3L T-TRUCK -- 8TLM 8TN 8663925 6.2L DIESEL R/G-TRUCK -- 8MHM,8TNM 8TU 8663926 5.7L R/G-TRUCK 7MWM,7TUM 8MWM,8TUM 8TX 8663927 5.7L K/V-TRUCK 7TXM 8TXM 8YD 8663929 5.7L Y-CAR (3.07 AXLE) 7YDM 8YDM 8YK 8663930 5.0L B-CAR 7YKM 8YKM 8YM 8663931 5.7L MPFI F-CAR 7YMM 8YMM 8YN 8663932 5.7L B-CAR (POLICE) 7YNM 8YNM 8YP 8663933 5.0L F-CAR -- 8YPM 8YT 8663934 4.3L B-CAR 7YTM 8YTM 8YW 8663935 5.0L F-CAR (IROC) 7YWM 8YWM 8YX 8663936 2.0L F-CAR 7YXM 8YXM 8YZ 8663937 5.0L F-CAR 7YZM 8YZM

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.