GB2023002

GENERAL BULLETIN GB2023002
GM - IH IROS Fuel Tank Option Compatibility
An Oshkosh Corporation Company
Subject:
Attn:
From:
Date:
Affected Models:
GM - IH IROS Fuel Tank Option Compatibility
IMT Distributors
IMT Sales
April 1, 2023
All Dominator Body Models
IMT has been recently made aware that GM Silverado 4500/5500/6500 and International CV series chassis
equipped with IROS (International Ride-Optimized Suspension) air ride suspension are not compatible with
IMT Dominator bodies if the chassis is equipped with a rear mounted fuel tank. The air ride suspension with
rear mounted fuel tank configuration requires an after frame dimension that exceeds the allowable maximum
for mounting of a Dominator body.
Dominator bodies can only be upfitted with the IROS suspension only when combined with the 25 gallon
mid-mounted left side tank option. Chassis equipped with an incompatible fuel tank option cannot be used.
Please refer to the chart below.
FUEL TANK OPTION
GM OPTION CODE
IH OPTION CODE
(1) 40 GAL. REAR MOUNT
(1) 40 GAL. REAR MOUNT &
(1) 25 GAL. MID-MOUNT
(1) 25 GAL. MID-MOUNT
RPO N2L
15SZN
COMPATIBLE WITH IMT
DOMINATOR BODY
NO
RPO NSQ
15DSZ
NO
RPO NVK
15SZP
YES
Contact your Regional Sales Manager if you have questions.
Iowa Mold Tooling Co., Inc.
500 Highway 18 West • P.O. Box 189 • Garner, IA 50438-0189
641-923-3711• 641-923-6063 (Fax)
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