If it HAS a whole house filter it is nearly always located close to the water pump. Whole house filtrations systems filter water from both the FW tank and the city water inlet so both need to be handy to the canister.
If it's NOT a whole house filter they are usually located near the kitchen sink (usually under it).
Good luck / Skip
2011 F-150 HD Ecoboost 3.5 V6. 2550 payload, 17,100 GCVWR - 2004 F-150 HD (Traded after 80,000 towing miles) 2007 Rockwood 8314SS 34' travel trailer
US Govt survey shows three out of four people make up 75% of the total population
I have a 2008 Denali 31SBBS-M5 and the drinking water filter is in the cupboard that faces the entertainment center, that cupboard is basically under the rear of the sink. It is a simple snap in filter
Daughter #1 Miniature shnauzer (deceased Sept 2010)
Daughter #2 Cockapoo (deceased May 2011)
2007 Ford F250 Super Duty, FX4 XLT, 6.0 L Diesel,Crew,,Timbren SES kit, Toyo AT tires, ScangaugeII
2008 Denali 5th wheel model 31SB-M5,