NUMBER:
GROUP:
DATE:

18-060-20 REV. A
18 - Vehicle Performance
October 21, 2020

This bulletin is supplied as technical information only and is not an authorization for repair. No part of this publication may be reproduced, stored in a retrieval system, or
transmitted, in any form or by any means, electronic, mechanical, photocopying, or otherwise, without written permission of FCA US LLC.

This bulletin supersedes Service Bulletin , dated August 07, 2020, which should be removed
from your files. All revisions are highlighted with **asterisks**
This bulletin supersedes Technical Service Bulletin (TSB) 18-060-20, date of issue August 07,
2020, which should be removed from your files. All revisions are highlighted with
**asterisks** and include additional market and note for generic software release awareness.
SUBJECT:
6.7L Cummins Engine High Pressure Fuel Injection Pump Identification Differences
OVERVIEW:
This bulletin provides information regarding the identification differences in the high pressure fuel
injection pumps between the new style Symetrical Cam design pump and the old syle Asymetrical
Cam design used on the 6.7L Cummins in the 2019 and 2020 HD Trucks. The following information
is intended to eliminate confusion and possible noise complaints shortly after pump replacement
or ECM reprogramming.
MODELS:
2019 - 2020

(DJ)

RAM 2500 Pickup

2019 - 2020

(D2)

RAM 3500 Pickup

2019 - 2020

(DD)

RAM 3500 Cab Chassis

2019 - 2020

(DP)

RAM 4500/5500 Cab Chassis

NOTE: This bulletin applies to vehicles within the following markets/countries: North
America and **LATAM**.
NOTE: This bulletin applies to vehicles equipped with a 6.7L I6 Cummins Turbo Diesel
Engine (Sales Code ETL or ETN) or 6.7L I6 Cummins HO Turbo Diesel Engine (Sales
Code ETM).
NOTE: **Generic software support is available for the new design Symmetrical Cam Injection
Pumps for LATAM market**
DISCUSSION:
NOTE: Two calibration choices may be present when flashing the ECM. Please follow the
published technical service bulletin closely to avoid choosing the incorrect
calibration. Choosing the incorrect calibration will result in an undesirable noise from
the High Pressure Fuel Pump, requiring the ECM to be flashed again with the correct
calibration.
Whenever an ECM is replaced, or reprogrammed for any reason, the fuel injection pump must be
inspected to determine which design pump is installed on the vehicle. Additionally, when a fuel
injection pump is replaced with a new design pump, the ECM must be programmed with the correct
calibration to support this new design pump.

18-060-20 REV. A

-2-

Older design pumps have a Asymmetrical design internal cam. The newer design pumps have a
Symmetrical design internal cam. The design of the pump will determine which calibration will need
to be programmed into the ECM. From outward appearance both pumps look identical, with the
exception of specific identification marks machined into the body of the pump.
The inspection procedures listed below outline how to identify which design injection pump is
installed so that a technician can verify that the ECM is programmed with the correct calibration.
1. Inspect the fuel injection pump to see which pump the vehicle has:
• Vehicles with the new style Symmetrical Cam design pump will have one large single dot
embossed in the pump housing (Fig. 1) .
• Vehicles equipped with a Symmetrical Cam pump, choose the calibration labeled Symetric
Cam, or Sym Cam.

Fig. 1
New Style Symmetrical Cam Design Pump
1 - One large Single Dot on Housing

-3-

18-060-20 REV. A

• Vehicles with the old syle Asymmetrical Cam design will have either multiple dots or no dots
embossed in the pump housing (Fig. 2) .
• Vehicles with an Asymmetrical Cam pump, choose the calibration labeled Asymetric Cam or
Asym Cam.

Fig. 2
Old Style Asymmetrical Cam Design Pump
1 - Multiple Dots on Housing

POLICY:
Information Only