So, some of these codes aren't very useful without knowing which module(s) they came from, others can only come from one module.
B1676 - battery voltage out of range. This one can come from almost any module. Knowing which one it came from might help you to find a loose wire. On the other hand, you battery might actually be bad.
u1027 - missing engine RPM data from the PCM at the e-brake module, ABS module, and/or FEM.
u1041 - missing vehicle speed data from the ABS module at the instrument cluster, FEM, REM, and/or DDM.
u1040 - missing or invalid vehicle speed data at the e-brake module.
u1262 - communications bus fault at any of the following modules: e-brake, ABS, cluster, message center. Or just a general network fault.
b2797 - Driver Water Valve Circuit Open - a common issue with the climate control. Your DCCV probably needs to be replaced.
u1058 - e-brake module missing data from transmission range selector.
p0663 - Intake Manifold Tuning Valve Control Circuit/Open Bank 2
b2799 - Pass Water Valve Circuit Open - The other half of your bad DCCV (heater valve).
p2106 - Throttle Actuator Control System - Forced Limited Power - This could be from a bad throttle body or bad gas pedal, but it is almost always caused by marginal COPs (Coil-On-Plug iginiton coils) - Recommend that you replace all six COPs and all six spark plugs (at the same time).
c1988 - Yellow Fault Warning Lamp Indicator Circuit Failure for Electronic Parking Brake Module
b1875 - Turn Signal/Hazard Switch Signal Circuit Failure
It's possible that most of your issues can be solved by:
1. Replace all COPs and spark plugs - Known issue with all LSes.
2. Replace the DCCV - not an uncommon problem, causes issues with the climate control, and sometimes e-brake problems.
3. Replace the electronic parking brake module - 2004 was a bad year for e-brake modules.