32509 Force O RING

23Dec2011
(Revised 23Apr2012)
U-588
A-475
D-504
O-514
TT-15
Safety
PRODUCT IMPROVEMENT PROGRAM FOR REPLACING COOLANT IN CERTAIN C7S ENGINES IN SCHOOL BUSES
1350 1395 PI10883
This Program must be administered as soon as possible.When reporting the repair, use "PI10883" as the Part Number and "7751" as the Group Number, "56" as the Warranty ClaimDescription Code and "T" as the SIMS Description Code.
Exception: If the repair is done after failure, use "PI10883" as the Part Number, "7751" as the Group Number,"96" as the Warranty Claim Description Code, and "Z" as the SIMS Description Code.
This Revised Service Letter replaces the 23Dec2011 (Revised 05Mar2012) Service Letter. Changes have been made to the Parts Needed and the Action Required.
PROBLEM
This Product Improvement Program is a Safety Recall in accordance with the US National Motor Vehicle Safety Act and the Canadian Motor Vehicle Safety Act. Cooling system coolant in this application can degrade, which may cause engine components to prematurely deteriorate and a coolant leak could be experienced. If coolant leaks are observed, they should be immediately remedied. Failure to remedy a coolant leak, in conjunction with other factors or circumstances, may create the potential for a crash hazard.
It is a violation of US Federal law for a dealer to deliver a new motor vehicle or new or used engine covered by this Safety PIP until the PIP has been completed.
AFFECTED PRODUCT
Model Identification Number
C7 C7S00422, 722, 726, 981, 998, 1003, 1461, 1464-1465, 1467, 1472-1474, 1481, 1487, 1490, 1492, 1494, 1496-1497, 1500, 1502-1505, 1507, 1511, 1514, 1516, 1518, 1523, 1526, 1528, 1530, 1533, 1537, 1539-1540, 1543, 1547, 1549, 1553-1554, 1558-1559, 1562, 1564, 1566, 1571, 1575, 1577, 1579, 1581-1582, 1585-1586, 1588-1592, 1594-1601, 1603-1605, 1607-1609, 1612, 1614, 1617-1642, 1644-1646, 1648-1650, 1652, 1654-1655, 1658-1664, 1666-1675, 1677-1683, 1685-1691, 1693-1725, 1727-1733, 1735-1736, 1738-1740, 1742-1745, 1747-1767, 1769-1771, 1774-1778, 1780, 1782-1789, 1791-1792, 1794-1798, 1800-1802, 1804-1808, 1810-1811, 1814-1815, 1817-1818, 1820-1827, 1829-1834, 1836, 1838-1858, 1860-1861, 1863-1867, 1869-1904, 1906-1907, 1909-1914, 1916-1918, 1920, 1922-1925, 1927-1930, 1932, 1936-1937, 1939-1944, 1946-1955, 1957-1966, 1968-1971, 1973-1980, 1982-1995, 1999-2001, 2003, 2005-2017, 2019-2022, 2025-2031, 2033-2039, 2041-2069, 2071, 2073-2074, 2076-2085, 2087, 2089-2101, 2103-2105, 2108-2112, 2114-2118, 2120-2137, 2139, 2141-2145, 2147-2155, 2157, 2159-2164, 2167-2171, 2173-2176, 2178-2181, 2183-2195, 2197-2200, 2203-2216, 2219, 2221, 2223, 2228, 2239, 2243, 2261, 2264-2265, 2274, 2276, 2279, 2283, 2286, 2290, 2293, 2296, 2303, 2305-2316, 2318-2320, 2322-2324, 2326, 2328-2332, 2334, 2336-2379, 2381-2383, 2385-2416, 2419-2427, 2429, 2431-2434, 2439, 2443, 2445-2447, 2452-2457, 2459-2460, 2462-2463, 2466-2468, 2471-2472, 2475-2478, 2481-2482, 2485-2486, 2488, 2490-2491, 2493, 2495, 2497-2498, 2500-2505, 2508-2510, 2513-2515, 2517-2519, 2521, 2523-2524, 2526-2533, 2538-2539, 2541, 2543-2548, 2551, 2553-2554, 2556-2576, 2578-2594, 2596-2600, 2602-2606, 2608-2650, 2652-2672, 2674-2675, 2679, 2681-2682, 2684, 2686, 2688-2690, 2692, 2694-2696, 2699-2703, 2706-2708, 2710, 2712-2713, 2715, 2717, 2719-2720, 2722-2724, 2726, 2728-2740, 2742-2751, 2753-2757, 2759-2767, 2769-2781, 2783-2788, 2819, 2822, 2825, 2827, 2835, 2839, 2844-2845, 2848, 2863, 2868, 2876-2878, 2880-2888, 2891-2904, 2906-2911, 2913, 2915-2921, 2923-2935, 2938-2939, 2941, 2943, 2946-2952, 2956, 2958-2959, 2961-2962, 2965, 2967-2971, 2973, 2976, 2978, 2980, 2982-2986, 2990, 2993-2997, 2999, 3001-3002, 3004-3005, 3007-3008, 3011-3017, 3019, 3021-3022, 3025, 3031-3034, 3037-3043, 3045, 3048-3049, 3051-3052, 3054-3055, 3058-3059, 3061-3063, 3065-3066, 3070-3072, 3076-3077, 3079-3083, 3086-3089, 3091-3092, 3094, 3096-3097, 3099-3101, 3103, 3105-3107, 3111-3112, 3119, 3122, 3124-3125, 3127-3129, 3132-3137, 3139, 3141-3151, 3153-3155, 3158, 3160, 3162, 3164-3167, 3170, 3172, 3174-3175, 3177, 3180-3186, 3188-3195, 3199, 3203-3204, 3206, 3208-3210, 3212-3213, 3215-3216, 3219-3227, 3230-3237, 3241-3243, 3245-3247, 3250, 3252-3253, 3256, 3260-3263, 3265-3267, 3269-3279, 3281-3297, 3299-3308, 3310-3363, 3365-3389, 3391-3404, 3406-3411, 3413-3422, 3424-3430, 3432-3444, 3446-3455, 3457-3509, 3511-3518, 3520, 3522-3528, 3530-3540, 3543-3544, 3546-3548, 3550-3554, 3556-3557, 3559-3562, 3566, 3568, 3570, 3572, 3575, 3581, 3584, 3586-3587, 3589, 3592, 3601, 3603, 3605-3610, 3615-3618, 3620, 3622-3623, 3625, 3628, 3634, 3636-3637, 3642, 3645-3646, 3649, 3652, 3654-3659, 3661, 3663, 3665-3666, 3669, 3677-3678, 3680, 3683-3687, 3689-3691, 3694-3697, 3699-3702, 3704-3707, 3709-3712, 3714-3715, 3717, 3719-3720, 3722-3726, 3728-3737, 3739-3742, 3745-3752, 3754, 3873-3875, 3877-3878, 3880, 3884-3885, 3887-3890, 3892-3893, 3896-3902, 3904, 3907-3911, 3922, 3925, 3929-3930, 3935-3936, 3938, 3941, 3943-3945, 3952-3953, 3958-3959, 3964, 3966-3968, 3971, 3974, 3979, 3981-3982, 3985, 3988, 3991, 4433-4466, 4470-4479, 4483-4485, 4488-4499, 4501-4504, 4506, 4508-4514, 4517-4521, 4524-4531, 4533, 4536, 4538, 4541-4543, 4546-4548, 4552, 4555, 4558-4566, 4568, 4570-4571, 4573, 4588, 4592, 4594, 4604, 4607, 4612, 4620, 4627-4628, 4630, 4636, 4639-4641, 4643, 4645, 4649, 4653, 4655-4656, 4660, 4662, 4664, 4668, 4676, 4680-4681, 4689, 4697, 4702, 4705, 4707-4713, 4716, 4718-4722, 4725-4727, 4729, 4732, 4734, 4737-4738, 4742, 4744-4745, 4747-4753, 4757, 4759-4761, 4763-4765, 4767-4768, 4771, 4774, 4776-4780, 4782-4783, 4785, 4787-4791, 4793-4794, 4796-4797, 4800-4802, 4804-4805, 4807-4826, 4828-4829, 4831-4840, 4842-4852, 4854-4861, 4863-4866, 4868-4873, 4875, 4878-4879, 4881, 4883-4899, 4902-490