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2003 Cadillac CTS fuel pump

Tiny
LEVIDNEAL
  • MEMBER
  • 2003 CADILLAC CTS
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 150,320 MILES
How do you replace the fuel pump and also the transition pump in the 2003 cts.
Thursday, April 16th, 2009 AT 3:01 PM

2 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Fuel pump is in tank on upper right side. Remove hoses and electrical connectors. Then using Fuel Tank Sender wrench J-45747 remove.
Not sure what a transition pump is
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Thursday, April 16th, 2009 AT 4:09 PM
Tiny
FACTORYJACK
  • MECHANIC
  • 4,159 POSTS
There is no transition pump, it transfers from side to side by siphon. Did the pump quit, or are you running out of gas when gauge still reads 1/8 to 1/4 tank? There is what is called a jet pump on the rh primary module, and a siphon tube that runs from the left sender to the rh primary. This tube was upgraded, and is recommended if gauge error is the complaint.
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Thursday, April 16th, 2009 AT 10:54 PM

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