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So I have 2013 gmc terrain v6, engine light came on so I hooked up my blue driver reader and it shows P2635 fuel pump 'A' low flow. Any ideas of what might be causing this.thanks
 

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From the 2014 Equinox GM repair manual:
Possible reasons for setting DTC P2635
Low, intermittent, in tank fuel pump pressure, should be between 50 to 95 PSI
Faulty fuel pump control module
Faulty fuel pressure sensor
 

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2011 Equinox 1LT V6 3.0L FWD 174.4k miles
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@Hotlanda : yeah ... I saw that listed online as a possible cause. Also saw people replacing the fuel pump in the tank (to no avail), and one guy claiming a new battery fixed it.

If you have a 2013, you might be getting close to needing your 3rd battery for that vehicle. Something to keep in mind if the code comes back...
 
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